Until recently, it was thought that menopause, a period in women's lives when they stop producing eggs and which seems to be unique to humans, was an evolutionary strategy aimed at preventing women from reproducing after a certain age in order to that, in this way, they would act as grandmothers and take care of their grandchildren (the "grandmother effect"). But a team of biologists from McMaster University, led by Rama Singh, argue that this theory makes no sense from an evolutionary point of view and claims to have found a valid alternative.
When she is hungry and needs an extra supply of energy, the female southern bottletail squid does not hesitate: she ingests part of the semen that her partner ejaculates. This is the conclusion reached by Bob Wong and his colleagues at Monach University (Australia) in a study published by Biology Letters. This is the first time this behavior has been observed in a cephalopod.
Finnish scientists have concluded that the ratio of the width to the height of the face makes it possible to predict how many children a person will have. According to John Loehr and his colleagues in the journal Biology Letters, for their study they have been based on the analysis of the shape of several hundred male faces of soldiers who participated in World War II, in addition to collecting some personal data from the combatants.
A photograph of the inside of a house fly taken at the University of Granada (UGR) with a microtomograph (a device that allows scanning small animals at high resolution) has been awarded as the best image of the year 2013 worldwide at the international congress of microtomography “MicroCT Meeting 2013”, recently held in Hasselt (Belgium).
It is almost infallible: if a baby cries inconsolably, having one of his parents pick him up instantly calms him down. U A study published in the journal Current Biology shows that this response is common to all mammals, from mice to humans.
Yes, at least in tadpoles. Researchers at the University of Michigan recently demonstrated that, in addition to preparing the body to defend itself or to quickly escape danger, stress hormones are responsible for altering the body shape of developing animals so that they are better equipped to do so. survive.
Danni Büchner is invited to Sam Dylan's Halloween party. But the "Goodbye Germany" emigrant has no desire for many other party guests. And find clear words.
