A puffin carrying tree branches in it's mouth

Puffins Seen Using Tools, Breaking Dumb-Puffin Stereotypes

Reputed to be a less intelligent bird species, puffins have been observed scratching themselves with sticks.
World map showing the zoogeographical regions by Alfred Russel Wallace

The 1876 Map of the World’s Ecozones That Still Holds Up

The 19th-century naturalist Alfred Russel Wallace created a visualization that tied different species to specific regions of the world.
A cartoon of a T Rex holding a boom box

Take These Teenage Dinosaurs Seriously!

Paleontologists recently solved the riddle of whether two fossil specimens were young T. rexes or a whole different species.
Organ Pipe Cactus National Monument

Bulldozers Versus Biodiversity, Then and Now

Trump's border wall threatens habitats in Arizona's Sonoran Desert. What happened when the area was bulldozed in the 1950s?
Thick Billed Parrots

The Thick-Billed Parrot Is Not Extinct–Not Yet

But one hasn't been seen in the U.S. since 1995, not long after the end of the last reintroduction program.
agave

Plant of the Month: Agave

The international popularity of tequila threatens the quantity, health, and biodiversity of all species of agave.
An octopus

Stuck in the Midden with You

A midden is, among other things, a refuse site outside an octopus' home. (Release the Køkkenmødding!)
Closeup shot of a group of unrecognizable people holding plants growing out of soil

Five Green Living Resolutions for 2020

We won't solve all of the pressing environmental problems, but we can help mitigate some.
Parmelia Lichen

Lichens as Sensors for Air Pollution

Lichens often go unnoticed, living on the ground, on tree trunks, or on rocks. They're hearty, but remarkably sensitive to air pollution.
Mussels

When Cancer Spreads between Species

The exchange of cancerous cells between organisms is rare. Scientist studied how it happened across species of mussels.