For many stands of these trees, only large diameter ... in the 1960s by the dominance of top-predator starfish in intertidal ecosystems. Keystone species are species that play a disproportionately ...

Lightning strikes may kill hundreds of millions of trees every year, but one tropical tree has evolved to benefit from the ...

Bonnie Hao | Beijing, China Scientists can’t pinpoint exactly why starfish evolved to have radial symmetry, with arms—usually five, but as many as 40 in some species—growing from a central axis.

While earlier studies had shown that some starfish that live in shallower, brighter water have and use compound eyes, no one had previously looked at animals occupying the sea floor. “What you see in ...