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fossil

Travels in Geology: Exploring Connecticut's Ancient Rift Valley

Fifty years ago, a bulldozer operator in Connecticut discovered one of the largest dinosaur tracksites in North America, now preserved at Dinosaur State Park. The formation of the tracksite, which lies in the remnant of a Triassic rift valley, is linked with the demise of the supercontinent Pangea. 

17 Feb 2015

Crumbly amber holds dinosaur secrets

In the movie “Jurassic Park,” dinosaurs were resurrected from DNA in blood harvested from Mesozoic mosquitoes preserved in amber. The plot was pure science fiction, but a new study has found another use for the biological material trapped in fossilized tree resin. By studying microscopic inclusions of plant material, pollen and feathers preserved in bits of amber recovered alongside dinosaur fossils, paleontologist Ryan McKellar of the Royal Saskatchewan Museum in Canada is recreating a more complete picture of the Mesozoic landscape.

 
12 Feb 2015

Scientists sequence oldest modern human genome to date

A chance fossil find along a Russian river has provided researchers with the oldest genomic data ever sequenced from a modern human. The fossil, a nearly complete left femur, was pulled from a bank along the Irtysh River near the Ust’-Ishim district in western Siberia in 2008 by a Russian artist before it made its way to scientists.

11 Feb 2015

Stegosaur's tail packed a lethal punch

With their big lumbering bodies and plates of armor, stegosaurs can be likened to the modern-day rhinoceros. Both are primarily peaceful plant eaters, but you wouldn’t want to make either of them mad. Now, paleontologists have uncovered evidence of a casualty of stegosaurian combat: a predatory allosaur with a lethal conical wound the size and shape of a stegosaur tail spike.

07 Feb 2015

New species of titanosaurus discovered in Tanzania

The Cretaceous landscape was dominated by huge herbivorous sauropods, the largest land animals ever to walk the planet. Fossils from many of these massive creatures have been unearthed around the world, but the recent discovery of a new specimen of titanosaurus in Tanzania is among the first sauropods found on the African continent.

14 Jan 2015

Hallucigenia finally finds a home

A fossil so bizarre that it was formally dubbed Hallucigenia has finally found a place in the evolutionary tree of early life. One of the more head-scratching fossils to come out of the famous 500-million-year-old Burgess Shale assemblage in British Columbia, the worm-like creature with legs, spikes and a head difficult to distinguish from its tail was originally drawn both backwards and upside down: The spines were originally thought to be legs, and its legs were thought to be tentacles.

02 Jan 2015

All dinosaurs may have had feathers

Since the first feathered dinosaur was discovered in China in 1996, more and more feathered theropod specimens have been found. Now, a new nontheropod fossil found in Siberia and described in Science suggests that all species of dinosaurs may have had feathers.

01 Jan 2015

Oldest-known skeletal animals found

The Ediacaran Period, which lasted from 635 million to 541 million years ago, is famous for the evolution of soft-bodied organisms that pre-dated the Cambrian Explosion, the relatively brief period during which most of the major animal phyla appeared. Now, Ediacaran-aged animals with skeletons have been found.

29 Dec 2014

Limited ranges left ammonites vulnerable to extinction

Why spiral-shelled, ocean-faring ammonites went extinct at the end of the Cretaceous while the nautilids — the ammonites’ less abundant and less diverse cephalopod relatives — survived has long puzzled paleontologists. Nautilids tended to dwell deeper in the ocean than ammonites, perhaps keeping them farther out of harm’s way after the asteroid struck, which likely led to acidification of the ocean surface. Now, a new study suggests that the animals’ geographic range may have contributed to which ones lived and which ones died.

13 Dec 2014

Ohio millers imported French stone

What’s the difference between France and Ohio? A few fossils. Common Ohio chert looks like a rock called French buhr found around Paris, except for a couple of fossils. Researchers say these fossils can be used to distinguish the Ohio flint from its often-misidentified French lookalike.

04 Nov 2014

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