Scientists have identified specialized iron-rich cells that could act as a natural compass in pigeons, shedding new light on one of nature’s greatest mysteries.

Pigeons and other birds can do it. So can sea turtles and spiny lobsters, moths and mole rats, gray whales and big brown bats ...

America throws some of the most punishing weather on the planet at its wildlife. From the subzero blizzards of the northern Great Plains to the scorching desert floors of Death Valley, from ...