Stuffed Passenger Pigeon atop a wooden perch

Passengers Long Gone

Martha, last of the passenger pigeons. 
A close-up of a cell fossil

The Mystery of Megasphaera

When did animals first come into being? It might have been millions of years earlier than we thought.
Fossilized bone of Psittacosaurus liujiatunensis

Recession Lessons from an Ancient Fossil Bed

In a 120-million-year-old rock in Northeast China, paleontologists made a remarkable find.
An overhead perspective of a Common Green Darner on a green leaf

Long-Distance Migration: Everybody’s Doing It

The birds do it. The butterflies do it. And now we know that the dragonflies do to it, too: long-distance migration. 
Microscope view of three tapeworm eggs

Happy 100th Birthday to the Journal of Parasitology!

This year, the Journal of Parasitology celebrates its 100th anniversary
Orange and rust autumn leaves, illustrated

Why Do Leaves Change Colors in the Fall?

Why do leaves change colors in fall?
Various Dendrogamma, a new species, shown to scale and from several perspectives to show the tops, sides, and length of the organisms

New Organism Might Represent One of Life’s Earliest Forms

Dendrogramma enigmatica, an organism discovered in the 1980s, may be one of the earliest lifeforms.
A lone wolf walking a city's sidewalks.

Keeping Up with the Carnivores

Biological research tracks predatory carnivores, who are increasingly veering into North American cities.
A young coyote in a field.

Gotham Coyote Project

Coyotes in New York City? You bet. Read more about carnivores living in urban areas.
Grassy Lake in the John Muir Wilderness

The Wilderness Act Celebrates its 50th Birthday

The federal Wilderness Act was signed 50 years ago.