It depends on the particular species and the details of their life history. There are species with larger males that fight for territory and access to smaller females (like elk or lions), species with large females and tiny males (like many spiders or deep-sea anglerfish), species where the two sexes are about the same size (like garden snails or Canada geese), and species where size change eventually leads to a sex change. As it turns out, the size difference in schistosomes changes with the variable you measure: females are a bit longer than males, but males are a bit thicker than females.

Its true. We dont really know what their babies will be like, even though its clear she thinks his success is sexy.

The papers I read suggested that theyre pretty common in dogs and wild canids worldwide, but only occasionally cause serious health problems. And there wasnt any indication that they can survive in people. But the idea that theyre lurking in your pets saliva? Ewwww.

Cambias says he remembers seeing this video when he visited the Air and Space museum as a child; I was (alas) not so well traveled at that age.

I actually know her from school, too. Sarah was one of my students at Mount Holyoke.

Let us know what you think of the maze. We had a good time, despite some teenage grousing from our offspring.

Glad you like them. And it's Friday again...