Wednesday, September 09, 2015

Born This Day: Joseph Leidy


From The Academy of Natural Sciences:

Leidy (Sept. 9, 1823 - April 30, 1891) is known as the "Father of American Vertebrate Paleontology". He described the first relatively complete dinosaur skeleton, Hadrosaurus, and introduced many American and European scientists to the fossil riches of the American West. Leidy's consummate skill in comparative anatomy would allow him to identify and characterize even the most fragmentary fossil material.

Leidy was also the "Founder of American Parasitology," a Professor of Anatomy at the University of Pennsylvania, a pioneering protozoologists, an influential teacher of Natural History, an accomplished microscopist and scientific illustrator, and an expert on a variety of subjects encompasing the earth and natural sciences. He published scientific papers on more than a thousand extinct and living protozoa, fungi and invertebrates and vertebrates as well as an assortment of publications on human biology and medicine. He was also one of the earliest supporters of Charles Darwin.

Born This Day: William Lonsdale

Image from PBS.org

Lonsdale (Sept. 9, 1894 - Nov. 11, 1971) was an English geologist and paleontologist whose study of coral fossils found in Devon, suggested (1837) certain of them were intermediate between those typical of the older Silurian System (408 to 438 million years old) and those of the later Carboniferous System (286 to 360 million years old).

Geologists Roderick Murchison and Adam Sedgwick agreed. They named (1839) this new geologic system after its locale—the Devonian System.

Lonsdale's early career was as an army officer (1812-15) and later he became curator and librarian of the Geological Society of London (1829-42). He recognized that fossils showed how species changed over time, and more primitive organisms are found in lower strata. Charles Darwin used this to support his evolution theory. From Today In Science

Friday, September 04, 2015

Antillothrix bernensis, 1 Million Year Old Caribbean Monkey


'The presence of endemic new world monkeys on the Caribbean islands is one the great questions of bio-geography and our work on these fossils shows Antillothrix existed on Hispaniola relatively morphologically unchanged for over a million years. By establishing the age of these fossils we have changed the understanding of primate evolution in this region.' said Dr Green.

Read more at: Phys Org News.

Thursday, September 03, 2015

Tuesday, September 01, 2015

Died This Day: Luis Alvarez

Alvarez (June 13, 1911 - Sept. 1, 1988) was an American experimental physicist who was awarded the Nobel Prize for Physics in 1968 for work that included the discovery of many resonance particles --subatomic particles having extremely short lifetimes and occurring only in high-energy nuclear collisions.

In about 1980 Alvarez (left) helped his son, the geologist Walter Alvarez (right), publicize Walter's discovery of a worldwide layer of clay that has a high iridium content and which occupies rock strata at the geochronological boundary between the Mesozoic and Cenozoic eras; i.e., about 66.4 million years ago.

They postulated that the iridium had been deposited following the impact on Earth of an asteroid or comet and that the catastrophic climatic effects of this massive impact caused the extinction of the dinosaurs. Though initially controversial, this widely publicized theory gradually gained support as the most plausible explanation of the abrupt demise of the dinosaurs.

Read more HERE. Image from HERE.

Monday, August 31, 2015

U of Alberta VP Exhibit, 1935


Thanks to Clive Coy for the image.

Saturday, August 29, 2015

How Many Dinosaurs Are There?

Palaeodiversity and formation counts: redundancy or bias?. 2015. M. Benton, Palaeontology.


In a new study published this week, Professor Mike Benton has explored how knowledge about dinosaurs has accumulated over the past 200 years, since the first dinosaur was named in 1824.

His research does not answer the question once and for all, but it suggests that strong caution is needed with some popular methods to 'correct' the fossil record. From: http://phys.org/news/2015-08-good-bad-fossil-dinosaurs.html#jCp

Thursday, August 27, 2015

Premiered This Day (1978): Planet of The Dinosaurs



Directed by James Shea in 1978, this film featured some nicely animated dinosaurs.

Wednesday, August 26, 2015

Gueragama sulamericana, New Lizard from the Cretaceous of Brazil

A stem acrodontan lizard in the Cretaceous of Brazil revises early lizard evolution in Gondwana. 2015. Nature Communications


University of Alberta paleontologists have discovered a new species of lizard, named Gueragama sulamericana, in the municipality of Cruzeiro do Oeste in Southern Brazil in the rock outcrops of a Late Cretaceous desert, dated approximately 80 million years ago. PR

Monday, August 17, 2015

Premiered This Day (1975): The People That Time Forgot


Directed by Kevin O’Connor, this 1977 film starring Doug McClure was a sequel to “The Land That Time Forgot” (1975).

Saturday, August 15, 2015

Happy Birthday to Lori Nelson



Nelson played Helen Dodson in the 1955 film, “Revenge of the Creature”. imdb info

Tuesday, August 11, 2015

Died This Day: Lorenz Oken

Lorenz Oken (Aug. 1, 1779 - Aug. 11, 1851) was a German naturalist who offered early evolutionary ideas and stimulated comparative anatomy. He theorized (incorrectly) that the skull was a modified vertebra, but formed some fundamental concepts which stimulated further thought from later scientists.

In Die Zeugung, he discussed “the infusoria”—elementary units of living organisms—into which all flesh can be broken down. Higher animals, he proposed, consisted of constituent animalcules. Entities, whether plants or animals, became organisms by the fusion of these primal animals. Those elements lose all individuality and create a higher unity. From Today In Science History

More here

Monday, August 10, 2015

Premiered This Day: Dinosaurus! (1960)


Dinosaurus! (1960) was directed by Irvin Yeaworth and produced by Jack H. Harris. The movie poster is pretty bland so I’m presenting the cover for the comic adaptation instead.

The film is most notable for the fact that the 'Brontosaurus' model and miniature jungle from the film were used for an episode of the The Twilight Zone (1959) ("The Odyssey of Flight 33). Wikipedia

Friday, July 10, 2015

Sunday, July 05, 2015

The Petrified Forest

Read it here

Born This Day: Ernst Mayr

Any student of biology, or anyone with an interest in the natural world, will be familiar with Ernst Mayr who passed away on February 3rd in Bedford, Mass. Born in Kempton, Germany he joined the American Museum of Natural History as a curator in 1931. In 1953 he left the museum to work at Harvard University where he stayed until his retirement in 1975.

While working on the problem of speciation in the birds of New Guinea, Mayr realized that the multitude of species and and subspecies that he saw could best be explained as being a snapshot of evolution in action. He suggested that new species could arise when the range of one species was fractured long enough for members in different parts of the range to evolve characters that would not allow individuals to reproduce when they were brought back together again. This lead to him developing the “biological species concept” in which species are defined as populations of interbreeding organisms rather than just a collection of characters. This idea, along with his theory of “allopatric speciation” was published in his book “Systematics and the Origin of the Species” (1942) and later contributed to the “Punctuated Equilibrium” theory of Niles Eldredge and Stephen Jay Gould.

Ernst Mayr was himself inspired by the work of geneticist Theodosius Dobzhansky on the fruit fly Drosophila melanogaster and his book “Genetics and the Origin of the Species” (1937). These two men, together with the paleontologist George Gaylord Simpson, combined the sciences of genetics, zoology and paleontology into what is now known as “the new synthesis” that provides the modern experimental underpinning to the concepts that Charles Darwin presented in his book, “On the Origin of the Species” .

For anyone interested in learning more about modern evolutionary theory I’d recommend Mayr’s recent book “What Evolution Is” (2002). It’s written in an engaging and readable format from the perspective of someone who’s thought about evolution all his life.
[ a palaeoblog autopost]

Friday, July 03, 2015

Single-Celled Predator Evolves Human-Like 'Eye'

Eye-like ocelloids are built from different endosymbiotically acquired components. 2015. Nature

A single-celled marine plankton evolved a miniature version of a multi-cellular eye so complex that it was originally mistaken for the eye of an animal that the plankton had eaten.
The eye-like structure contains a collection of sub-cellular organelles that look very much like the lens, cornea, iris and retina of multicellular eyes -- known as camera eyes -- that are found in humans and other larger animals.

Light micrograph (left), illustration (center) and transmission electron micrograph (right) show the eye-like structure in warnowiid dinoflagellates. PR

Thursday, July 02, 2015

Saber-Toothed Cat Canines Took Years To Grow

Using a Novel Absolute Ontogenetic Age Determination Technique to Calculate the Timing of Tooth Eruption in the Saber-Toothed Cat, Smilodon fatalis. 2015. PLoS One


The eruption rate of S. fatalis's permanent upper canines was 6 millimeters per month--double the growth rate of an African lion's teeth. But the extinct cat's dagger-like canines weren't fully developed until about three years of age. PR

Tuesday, June 30, 2015

Monday, June 29, 2015

Born This Day: Ray Harryhausen


Ray would have been 95 today.
Visit Ray's official site.

Died This Day: Thomas Huxley

From the UC Berkeley Page:

Huxley (May, 4, 1825 - June 29, 1895) was born in Ealing, near London, the seventh of eight children in a family that was none too affluent. At 21, Huxley signed on as assistant surgeon on the H.M.S. Rattlesnake, a Royal Navy frigate assigned to chart the seas around Australia and New Guinea. Huxley collected and studied marine invertebrates, in particular cnidarians, tunicates, and cephalopod mollusks. After leaving the Navy in 1854, Huxley managed to secure a lectureship at the School of Mines in London.

Huxley was a passionate defender of Darwin's theory -- so passionate that he has been called "Darwin's Bulldog" – and also a great biologist in his own right, who did original research in zoology and paleontology.

He is best known for his famous debate in June 1860, at the British Association meeting at Oxford. His opponent, Archbishop Samuel Wilberforce, was not-so-affectionately known as "Soapy Sam" for his renowned slipperiness in debate. During the debate, Archbishop Wilberforce ridiculed evolution and asked Huxley whether he was descended from an ape on his grandmother's side or his grandfather's. Accounts vary as to exactly what happened next, but according to one telling of the story, Huxley muttered "The Lord hath delivered him into my hands," and then rose to give a brilliant defense of Darwin's theory, concluding with the rejoinder, "I would rather be the offspring of two apes than be a man and afraid to face the truth."

All accounts agree that Huxley trounced Wilberforce in the debate, defending evolution as the best explanation yet advanced for species diversity.

However, Huxley did not blindly follow Darwin's theory, and critiqued it even as he was defending it. In particular, where Darwin had seen evolution and a slow, gradual, continuous process, Huxley thought that an evolving lineage might make rapid jumps, or saltations. As he wrote to Darwin just before publication of the Origin of Species, "You have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum [Nature does not make leaps] so unreservedly."



Huxley's most famous writing, published in 1863, is Evidence on Man's Place in Nature. This book, published only five years after Darwin's Origin of Species, was a comprehensive review of what was known at the time about primate and human paleontology and ethology. More than that, it was the first attempt to apply evolution explicitly to the human race. Huxley explicitly presented evidence for human evolution.

Huxley founded a remarkable dynasty of English scientists and thinkers. His son Leonard was a noted biographer and "man of letters." Leonard's oldest son Julian was one of the authors of the evolutionary synthesis of the early 20th century; Julian's son Francis became a noted anthropologist. Julian's brother Aldous Huxley was a novelist, screenwriter and essayist; his best-known book is the anti-utopia Brave New World.

Saturday, June 27, 2015

Friday, June 26, 2015

Hallucigenia’s Head

Hallucigenia’s head and the pharyngeal armature of early ecdysozoans. 2015. Nature

Illo by Danielle Dufualt

Abstract: The molecularly defined clade Ecdysozoa comprises the panarthropods (Euarthropoda, Onychophora and Tardigrada) and the cycloneuralian worms (Nematoda, Nematomorpha, Priapulida, Loricifera and Kinorhyncha). These disparate phyla are united by their means of moulting, but otherwise share few morphological characters—none of which has a meaningful fossilization potential. As such, the early evolutionary history of the group as a whole is largely uncharted.

Here we redescribe the 508-million-year-old stem-group onychophoran Hallucigenia sparsa from the mid-Cambrian Burgess Shale. We document an elongate head with a pair of simple eyes, a terminal buccal chamber containing a radial array of sclerotized elements, and a differentiated foregut that is lined with acicular teeth. The radial elements and pharyngeal teeth resemble the sclerotized circumoral elements and pharyngeal teeth expressed in tardigrades, stem-group euarthropods and cycloneuralian worms.

Phylogenetic results indicate that equivalent structures characterized the ancestral panarthropod and, seemingly, the ancestral ecdysozoan, demonstrating the deep homology of panarthropod and cycloneuralian mouthparts, and providing an anatomical synapomorphy for the ecdysozoan supergroup.

The topology shown denotes a newly retrieved ‘hallucishaniid’ clade—diagnosed by a swollen head, dorsal spines, and the differentiation of the anterior trunk and trunk appendages—includes luolishaniids, Orstenotubulus (not shown) and Carbotubulus within a paraphyletic ‘Hallucigenia’.

Tuesday, June 23, 2015

Died This Day: William Crawford Williamson - Father of Paleobotany


Williamson (Nov. 24, 1816-June 23, 1895) was an English naturalist who founded modern paleobotany. His father, John Williamson, was a Yorkshire geologist and the friend of William Smith, the father of English geology. Dr. Williamson's first paper (on organic remains in the Lias of Yorkshire) was published in 1834, when he was only 18.. In 1835 he was appointed curator of the Manchester Natural History Museum, a post which he held while pursuing his medical studies. His numerous earlier papers include one of the first memoirs on Foraminifera, a series of papers on the development of the scales and teeth of fishes.

Williamson was one of the oldest Fellows of the Royal Society, having been elected in 1854. He produced 19 memoirs on the "Organization of the Fossil Plants of the Coal-measures" between 1871 and 1893. He was appointed Professor of Natural History and Geology at Owens College, in 1851, and continued to hold the Chair of Botany until 1892. From here

Monday, June 22, 2015

Premiered This Day (1925): The Lost World


The first and greatest of the film versions of Sir Arthur Conan Doyle's classic book.

Starring the great Wallace Beery as Prof. Challenger, with stunning stop-motion animation by Willis O'Brien

Thursday, June 18, 2015

Giant 16 Million Year Old Walking Bats Discovered in New Zealand

Miocene Fossils Reveal Ancient Roots for New Zealand’s Endemic Mystacina (Chiroptera) and Its Rainforest Habitat. 2015. PLoS One

Kamandi by Jack Kirby © DC Comics

The new fossil bat species, Mystacina miocenalis, which lived 16 million years ago, walked on four limbs and was three times larger than today's average bat, have been discovered in New Zealand.

"Our discovery shows for the first time that Mystacina bats have been present in New Zealand for upwards of 16 million years, residing in habitats with very similar plant life and food sources," says Suzanne Hand.

These bats were believed to have an ancient history in New Zealand, but until now, the oldest fossil of a Mystacina bat in New Zealand was from a cave in South Island, dating to 17,500 years ago. This latest discovery forces a rethink of when these peculiar, walking bats first crossed the ditch, arriving from what is present-day Australia. PR

The Dragon from Die Nibelungen (1924)


From Gifts From The Sea, with more info.

Wednesday, June 17, 2015

Tuesday, June 16, 2015

Born This Day: George Gaylord Simpson

Simpson (June 16, 1902 - October 6, 1984) is known for his contributions to evolutionary theory and to the understanding of intercontinental migrations of animal species in past geological times. Simpson specialized in early fossil mammals, leading expeditions on four continents and discovering in 1953 the 50-million-year old fossil skulls of dawn horses in Colorado.

Simpson helped develop the modern biological theory of evolution, drawing on paleontology, genetics, ecology, and natural selection to show that evolution occurs as a result of natural selection operating in response to shifting environmental conditions. He spent most of his career as a paleontologist at the American Museum of Natural History. image. From Today In Science History.

Saturday, June 13, 2015

Born This Day: Luis Alvarez

Alverez (June 13, 1911 - Sept. 1, 1988) was an American experimental physicist who was awarded the Nobel Prize for Physics in 1968 for work that included the discovery of many resonance particles --subatomic particles having extremely short lifetimes and occurring only in high-energy nuclear collisions.

In about 1980 Alvarez (left) helped his son, the geologist Walter Alvarez (right), publicize Walter's discovery of a worldwide layer of clay that has a high iridium content and which occupies rock strata at the geochronological boundary between the Mesozoic and Cenozoic eras; i.e., about 66.4 million years ago.

They postulated that the iridium had been deposited following the impact on Earth of an asteroid or comet and that the catastrophic climatic effects of this massive impact caused the extinction of the dinosaurs. Though initially controversial, this widely publicized theory gradually gained support as the most plausible explanation of the abrupt demise of the dinosaurs.

Read more HERE. Image from HERE.

Premiered This Day (1958): The Beast From 20,000 Fathoms

Directed by Eugène Lourié, this was Ray Harryhausen’s first solo film after having finished his apprenticeship with Willis O’Brien on Mighty Joe Young. Apparently the dinosaur skeleton in the museum sequence was the same one used in Bringing Up Baby.

Thursday, June 11, 2015

Downsizing Dreadnoughtus?

Downsizing a giant: re-evaluating Dreadnoughtus body mass. 2015. Biology Letters.


Scientists have shown that the most complete giant, 26 metres long sauropod dinosaur, Dreadnoughtus, discovered in South America in 2014, was not as large as previously thought.

To estimate the mass of Dreadnoughtus scientists originally used a scaling equation that predicts body mass based on the size of thigh and arm bones. This method produced a range of estimates with the average being a colossal 60 tonnes.

Now another group of scientists have used a three-dimensional skeletal modelling technique to examine body mass more directly and found that the mass of the Dreadnoughtus was more likely to be between 30 and 40 tonnes, considerably less than originally thought.
Ah yes, the 'digitally dunking a toy model in water to measure displacement' method of estimating mass. I'll stick to the 'mass estimation' technique of Campione, et. al., 2014.

Premiered This Day (1993): Jurassic Park

The modern game-changer of dinosaur movies.

Wednesday, June 10, 2015

Dino Safety Rules

Born This Day: E.O.Wilson

Wilson is an American biologist noted for founding the science of sociobiology. In his book Sociobiology: The New Synthesis (1975) he argued that all human behavior, including altruism, is genetically based, and therefore “selfish.”

Wilson's On Human Nature (1978) won the Pulitzer Prize; Biophilia (1984) suggests that human attraction to other living things is innate; and Consilience (1998) urges wider integration of the sciences. Other books by Wilson are Insect Societies (1971), The Diversity of Life (1992), The Ants, with Bert Hölldobler (1990; Pulitzer Prize), and The Future of Life (2002).

Tuesday, June 09, 2015

Born This Day: William J. Arkell

Arkell (June 9, 1904 - April 18, 1958) was an English paleontologist who was an authority on Jurassic ammonites and their environments. He wrote Jurassic Geology of the World (1956), which critically reviewed the information dispersed throughout the world's enormous literature on the world's Jurassic stratigraphy.

He made numerous contributions to knowledge of the Jurassic stratigraphy, and gradually stabilized many stratigraphically significant zonal assemblages. In 1946, his "Standard of the European Jurassic" advocated a commission formulate a code of rules for stratigraphical nomenclature. image From Today In Science History: