A fish facing a larger rival sometimes returns to the mirror before choosing whether the size difference is worth a fight.

A Victorian color-photography idea returned inside elastic film, where pulling the material rearranges the microscopic mirrors that make the picture.

The rats learned when to search, when to hide, and that finding a human could end in tickling rather than food.

Nearly every seed opened in genuine Apollo regolith; the harder question began after germination, when the seedlings had to keep growing.

The carrier begins as flat wood veneer, then rain turns its three tails into legs and its coiling body into a drill.

A nighttime satellite image found warmth where an older map showed forest, and archived photographs revealed the landscape changing tree by tree.

The dolphins do not rub against any reef surface available; they seek a short list of corals and sponges and sometimes wait nose-to-tail for a turn.

This paint cools by rejecting sunlight in many sizes and sending its own heat through a clear infrared window in the sky.

A brainless jellyfish learned that faint stripes could mean an approaching mangrove root.

A bat changes vocal hardware when it drops from ultrasonic hunting calls into a low social growl.