Spider size is a question of gravity

[ExpandMyMind]

In some species of spider, males are far smaller than females; now, scientists think they know why.

A group of Spanish researchers says evolution favours small, light males because they can more easily traverse thin strands of silk.

But large females are favoured because they reproduce more abundantly.

Writing in the journal BMC Evolutionary Biology, the researchers say their finding helps to explain why this trait is so widespread among spiders.

Read more...