According to curator Kojiro Azumakawa, the horseshoe crab has a bowl-shaped smooth shell, spiny body, crab- or spider-like legs and a long, stout tail. It is a “living fossil” whose appearance ...

atomic blast just a mile away. Here’s the story of this living fossil that refuses to age—or die. In the first three seconds after “Little Boy” detonated over Hiroshima, temperatures ...