Search results
Results from the WOW.Com Content Network
After about 700,000 years, some mammals had reached 50 kilos (110 pounds), a 100-fold increase over the weight of those which survived the extinction. [159] It is thought that body sizes of placental mammalian survivors evolutionarily increased first, allowing them to fill niches after the extinctions, with brain sizes increasing later in the ...
Its center is offshore, but the crater is named after the onshore community of Chicxulub Pueblo (not the larger coastal town of Chicxulub Puerto). [3] It was formed slightly over 66 million years ago when an asteroid, about ten kilometers (six miles) in diameter, struck Earth. The crater is estimated to be 200 kilometers (120 miles) in diameter ...
Researchers in Europe and the U.S. have discovered that the dino-killing asteroid formed beyond the orbit of Jupiter in an extremely cold region and was rich in water and carbon, according to the ...
A really bad day: Dino-killing asteroid and the iridium anomaly While paleontologists have studied fossils for centuries, the science of mass extinction is relatively new.
To determine the dino-killing asteroid's origin, researchers examined the various elements in samples taken from several locations dating to the time of the mass extinction. In particular, they ...
Tanis is a paleontological site in southwestern North Dakota, United States. It is part of the heavily studied Hell Creek Formation, a geological region renowned for many significant fossil discoveries from the Upper Cretaceous and lower Paleocene.
Luis Walter Alvarez, left, and his son Walter, right, at the K–T Boundary in Gubbio, Italy, 1981. The Alvarez hypothesis posits that the mass extinction of the non-avian dinosaurs and many other living things during the Cretaceous–Paleogene extinction event was caused by the impact of a large asteroid on the Earth.
For premium support please call: 800-290-4726 more ways to reach us