Twins are pretty rare, accounting for just 3% of births in the U.S. these days. But new research shows that for primates 60 ...

and yet there is no comprehensive molecular phylogenetic hypothesis of primate evolutionary history that summarizes the pattern and timing of all primate relationships. Such a phylogenetic tree would ...

Throughout human history, twins have been rare, which often makes them seem extraordinary. Across various cultures, twins are ...

Twins are pretty rare, accounting for just 3% of births in the US these days. But new research shows that for primates 60 million years ago, giving birth to twins was the norm.

Jack M Craig, Dr. Blair Hedges, and Dr. Sudhir Kumar, all at Temple University, have built an evolutionary tree that encompasses 455 primates, every species for which genetic data are available.

Despite the fact that almost all primates today, including people, usually give birth to just one baby ... the history of litter size is to map the known litter size of as many species as possible ...

As members of the exclusive primate family, we humans know just how special ... shoulder joints designed to help them swing through trees. You won’t know from just looking at them, but great ...

and yet there is no comprehensive molecular phylogenetic hypothesis of primate evolutionary history that summarizes the pattern and timing of all primate relationships. Such a phylogenetic tree would ...

Despite the fact that almost all primates today, including people ... size of as many species as possible across the mammalian family tree and then use mathematical algorithms to look for ...

But having twins today is quite a different experience from our tiny primate ancestors birthing in the trees 60 million years ago. But having twins can be dangerous for both the mother and babies.