Taxonomy term

february 2019

Deep drilling reveals how impact crater's hidden ring formed

When the 15-kilometer-wide Chicxulub meteorite slammed into what is now Mexico’s Yucatán Peninsula 66 million years ago, it was moving at more than 20 kilometers per second. The impact blasted a hole 200 kilometers wide and more than 30 kilometers deep in Earth’s surface. The forces involved in such impacts are colossal — many orders of magnitude greater than the largest human-made explosions — and scientists have traditionally relied on models to explain what happens in the moments after impact. But in a new study looking at shocked rocks retrieved from the depths of the buried Chicxulub Crater, scientists have determined how the crater’s “peak ring” formed in mere minutes.

05 Feb 2019

Redefining Dinosaurs: Paleontologists are Shaking the Dinosaur Family Tree to its Roots

A radical reconfiguration of the classification of dinosaurs challenges an orthodoxy built on roughly a century and a half of research. But many paleontologists are not ready to accept such a big shift in our understanding of dinosaur evolutionary history.

04 Feb 2019

Where on Earth? - February 2019

Where on Earth was this picture taken? Use these clues to guess and submit your answer via mail, email or Web by the last day of the month (February 28, 2019).

01 Feb 2019

Climate cooling a driver of Neanderthals' extinction

Neanderthals disappeared from Europe roughly 40,000 years ago, and scientists are still trying to figure out why. Did disease, climate change or competition with modern humans — or maybe a combination of all three — do them in? In a recent study, researchers offer new evidence from Eastern Europe that climate change was a major player in the Neanderthals’ disappearance.

30 Nov 2018