Researcher Hans Roy opens a core sample taken from the bottom of the Pacific Ocean. A core sample like this one contained bacteria that settled on the seafloor 86 million years ago.
Bo Barker Jorgensen/Science/AAAS
The calico lobster known as Calvin is shown in this photo provided by Boston's New England Aquarium. The lobster is dark with bright orange and yellow spots.
Tony LaCasse/New England Aquarium
John Odenkirk holds up a snakehead. The fish can survive for long periods of time out of water as long as they're kept moist. They breathe air by gulping it, so they don't need to stay submerged.
Sabri Ben-Achour/for NPR