By Michael Marshall. Supposedly, if women live together their hormonal cycles start to synchronise, thanks to a pheromone. If that were true it would mean that they all have their period simultaneously. Just think about it. But it may not really exist.

Either your web browser doesn't support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. Free to read. Read article at publisher's site DOI : Grabowska A. J Neurosci Res , 95 , 01 Jan

All rights reserved. On December 11, scientists at the University of Lethbridge in Canada published a paper revealing what appear to be sex acts between young female Japanese macaques and sika deer. The wild monkeys were observed mounting the deer in Minoo, central Japan.

These are the core obsessions that drive our newsroom—defining topics of seismic importance to the global economy. Our emails are made to shine in your inbox, with something fresh every morning, afternoon, and weekend. The discovery has prompted a lot of marveling from the media. There are numerous documented instances of animal masturbation , a habit enjoyed by primates as well as creatures including dolphins, elephants, penguins, and bats.