PARIS — From the tiny chihuahua to the massive Saint Bernard, domestic dogs today trace their roots to a single group of wolves that crossed the path of humans as long as 40,000 years ago, researchers said Tuesday. Continue reading “Study throw dog domestication theories to the wolves”
PARIS — The sixth mass extinction of life on Earth is unfolding more quickly than feared, scientists have warned.
MIAMI — Researchers in Sweden have identified the top four things people can do to reduce their carbon footprint, but warned on Tuesday these steps are rarely promoted in the public sphere.
MIAMI — A massive asteroid strike that wiped out the dinosaurs millions of years ago created room for frogs to colonize the Earth, said a study Monday that shows how frogs became among the most diverse vertebrates in the world.
PARIS — Throughout its 4.5-billion-year history, Earth has been repeatedly pummeled by space rocks that have caused anything from an innocuous splash in the ocean to species annihilation. Continue reading “Are asteroids humanity’s ‘greatest challenge’?”