Morning Overview on MSN

Crabs evolved their body shape at least five separate times — but the sideways walk happened exactly once

There are roughly 7,000 species of true crabs on Earth, and nearly all of them scuttle sideways. That quirky gait is so ...
AZ Animals

Tiny Crabs Etch Perfect Spirals in Sand, Then Vanish with the Tide

A strange kind of “art show” appears with every low tide — only to vanish just a few hours later. The artists? Sand bubbler ...