About 100 million years ago, a baby chameleon crawled into some sticky resin. Over time, the resin fossilized into amber, leaving the lizard remarkably preserved.
With fat deposits that almost double their weight, the tiny ruby-throated hummingbird can fly non-stop for more than 1,200 miles (2,000 km) during migration.
Scientists found the creature in the deep sea, in the Hawaiian Archipelago. They nicknamed it Casper because of its ghostly appearance, caused by a lack of pigment.
Scientists estimate that slow, dense pyroclastic flows blanketed the southwestern U.S. after the enormous eruption at Silver Creek 18.8 million years ago.