Inside the stomach of an ancient wolf puppy found entombed in Siberian permafrost, scientists discovered meat from a woolly rhinoceros — and sequenced its genome.

Most astronauts who menstruate pause their cycle with hormones before hitting the stars, but in the future, we'll need more options.

Beauty-obsessed tweens and teens have set their sights on pricey Advent calendars using lip gloss and lotions to count down to Christmas.