Competition

The Design of a Beautiful Weapon

Video of Claws Out: Fiddler Crabs Do Battle This summer, many of you have likely enjoyed feasting on crabs, be they blue, stone, or Dungeness, and a special treat will have been the big,...

Claws Out: Fiddler Crabs Do Battle

Male fiddler crabs each have a single super-sized claw that they use as a weapon to threaten and fight other males and as beautiful adornment to attract females. Here, see a video of two...
A female and male Photerus annecohenae

You Light Up My World!

A female (top left) and male Photerus annecohenae. Note that females are larger than males (sexual dimorphism) and that males have bigger eyes. Credit: Jim G. Morin While people may give chocolates to the...
A zoomed-in image of the crown-of-thorns sea star.

A Plague of Sea Stars

Scientists have been studying why populations of crown-of-thorns sea stars ( Acanthaster planci ) have mushroomed in recent decades. Coral reefs can suffer when the sea star's numbers explode; the echinoderm has a healthy...