Mary VanDam pours coffee for patron Jim Brumm at Mr. B's Pancake House in Laketon Township, Mich. Cory Morse/Muskegon Chronicle via AP hide caption

itoggle caption Cory Morse/Muskegon Chronicle via AP

Scientists recently mapped the louse genome. It has only 108 million letters of DNA, which is fewer than in other insects they've mapped. Courtesy Aurelie Veracx hide caption

itoggle caption Courtesy Aurelie Veracx

A robotic sub found an underwater mountain range beneath Pine Island Glacier. British Antarctic Survey hide caption

itoggle caption British Antarctic Survey