Over the past 500 million years, vertebrates have evolved into an astonishing variety of forms, from hummingbirds to elephants, bullfrogs to hammerhead sharks, not to mention our peculiar species of…
Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news of fascinating discoveries, scientific breakthroughs and more.The idea of unexpectedly coming face to face with a spider-like…
Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news of fascinating discoveries, scientific breakthroughs and more.The idea of unexpectedly coming face to face with a spider-like…