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 ...

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.

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

Bringing back sunflower sea stars, which are functionally extinct in California, could help restore kelp forests off the ...