New dads that co-sleep with their children may experience a drop in their testosterone, says results from a recent study in the Philippines.

The findings are in a scientific journal called PLoS ONE, (which is ranked as the least sexy science journal) and come to us from Lee T. Gettler and company. Remember that name.

In the past, we’d reported that older dads may make kids with lower IQs, and that the male biological clock is set to 41. Well, Captain Science is at it again, and this week’s news is that older fathers might make healthier kids – and grandkids.

These findings were presented in Monday’s Proceedings of the National Academy of Sciences (we know, we know…you get it in the mail along with The New Yorker) by Dan T. A. Eisenberg, M. Geoffrey Hayes and Christopher W. Kuzawa. The researchers found that although these little biological things we have in our DNA called telomeres shorten as we get old, men who wait to have kids until they’re older tend to bestow longer telomeres to two generations of descendents.