Fish gets extra thrust by the teeth of its skin.

The post-9/11 quiet in Atlantic shipping lanes calmed the biggest marine mammals, hormone measurements suggest.

A scientist’s six-year backyard experiment strengthens the scenario for evolutionary changes due to industrial pollution.

The finding suggests nonhuman primates recognize their peers’ intentions and desires.

As invasive snakes expand territory, some mammal populations drop by more than 90 percent within a decade. (p. 5)

Forget E.T. It’s time to meet the intraterrestrials. They too are alien, appearing in bizarre forms and eluding scientists’ search efforts. But instead of residing out in space, these aliens inhabit a dark subterranean realm, munching and cycling energy deep inside the Earth. Most intraterrestrials live beneath the bottom of the ocean, in an unseen biosphere that is a melting pot of odd organisms, a sort of Deep Space Nine for microbes. Many make their homes in the tens of meters of mud just beneath the seafloor. Others slither deeper, along fractures into solid rock hundreds of meters d... (p. 18)

Microscopic structures in an iconic fossil feather suggest that it was the color of a crow.

The devastating fungus has already stripped shrubbery down to sticks in Europe and New Zealand.

Snakes use the waning throb in their prey as a signal to stop squeezing. (p. 14)