In Russia’s Yakutia region, mammoths and other ice-age creatures once roamed the land ... Some of the oldest mammoth fossils have been hidden in the permafrost for centuries.

After 22 months—the typical elephant gestation period—an ice age mammoth should, at least theoretically, be born into the computer-age world. But speedbumps abound. The business of rewriting ...

Although the bears in ice age North America were the biggest and most powerful carnivores ... the exaggerated curved tusks sported by their mammoth cousins. Mastodons were homegrown elephants ...