MicroRNAs Traced Back A Billion Years

MicroRNAs Traced Back A Billion Years

MicroRNAs, the tiny molecules that fine-tune gene expression, were first discovered in 1993, but it turns out they've been around for a billion years. Evidence published in Nature by scientists in…
HoxA-11 And The Evolution Of Pregnancy In Mammals

HoxA-11 And The Evolution Of Pregnancy In Mammals

Pregnancy is a biologically unusual situation where one organism lives and develops inside another that is genetically different. Ordinarily, the immune system identifies and destroys the dissimilar…
Bat Echolocation May Have Evolved Multiple Times

Bat Echolocation May Have Evolved Multiple Times

Bats' ability to echolocate may have evolved more than once, according to research published this week by Queen Mary, University of London scientists. Species of bat with the ability to echolocate do…