But first, you have to give birth to 2,000 babies. Sounds painful, right? Well, if you're a male seahorse, that's part of the job. Turns out, there are lots of animal dads out there who do all the ...

The difference, it turns out, was in the babies’ hippocampi, seahorse-shaped structures, one on each side of their brains. In the study, 13 babies were younger than a year, and 13 babies were ...