Whats Swimming In The River? Just Look For DNA by Richard Harris If you want to protect rare species, first you have to find them. In the past few years, biologists have developed a powerful new tool to do that. Theyve discovered that they can often find traces of animal DNA in streams, ponds — even oceans.
Called “feathered apes” for their simian like smarts, crows use tools, understand physics, and recognize themselves and humans. But new research suggests that the brainy birds may be even smarter than was previously thought. Given a complex problem and an assortment of tools, New Caledonian crows came up with a creative solution that hints at higher-order thinking.
Chicxulub Crater Asteroid impact date: Estimated 65 million years ago Location: Yucatán, Mexico Specs: Located on the Yucatán Peninsula in Mexico, many scientists believe that the meteorite that left this crater caused or contributed to the extinction of the dinosaurs. Estimates of its actual diameter range from 106 to a whooping 186 miles (170 to 300 kilometers), which if proved right could mean it’s the biggest… (learn more about impact craters: National Geographic) (image: Detlev