51风流

  • Dog wearing a red bandana
    鈥淔or most mammals,鈥 writes Science Magazine鈥檚 Elizabeth Pennisi, 鈥渟ize matters: Large ones, such as elephants and whales, live far longer than small ones like rodents. But among dogs, that rule is reversed. Tiny Chihuahuas, for example, can live up to 15 years鈥8 years longer than their much larger cousins, Great Danes. Now, a team of [鈥
    January 11, 2017