PALEO

paleo

Fossil leaves reveal effect of "impact winter"

When the Chicxulub bolide struck the Yucatán Peninsula at the end of the Cretaceous about 66 million years ago, widespread extinctions of land and marine animals resulted. However, the blast’s lasting effects on plants, which tend to be more resilient against impact-related fallout, have been less clear. Now, a new analysis of fossil leaves dating to around the end-Cretaceous offers some of the first quantitative evidence of a substantial shift in plant communities — toward more deciduous plants — following the impact.

05 Mar 2015

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

Getting there and getting around Connecticut's ancient Rift Valley

Central Connecticut is easily accessible via major roads and flights into Hartford’s Bradley International Airport. The region is well equipped with rental cars, hotels, restaurants and everything else a traveler could need.  The website www.ctvisit.com has maps and more details on all of the attractions listed here, as well as lodging, food and other activities.

 
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

Ancient cave art discovered in Indonesia

Europe has long been thought to have been the home of the oldest art in the world — including a stash of cave paintings in northern Spain that date to about 40,000 years ago — but a new dating technique may put Indonesia on the ancient art map as well.

06 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

Neanderthals dined on pigeons

The butchering, cooking and eating of birds has previously been thought to be an enterprise unique to modern humans, who were smart enough to catch them. However, a discovery in the dolomite caves of the Rock of Gibraltar shows that Neanderthals were the first to enjoy avian fare.

06 Jan 2015

Dating the demise of the Neanderthals

For a time, Homo sapiens and Neanderthals shared space in Europe, likely interacting and possibly interbreeding, but roughly 40,000 years ago the Neanderthals died out for unknown reasons. Pinpointing the extinction of the Neanderthals has proved difficult due to limitations in carbon-14 dating techniques, the accuracy of which declines in samples approaching and older than 50,000 years due to a decreasing amount of carbon-14 for testing. Now, using a new dating technique, scientists have confirmed that Neanderthals likely disappeared between 41,000 and 39,000 years ago.

04 Jan 2015

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