But one hasn't been seen in the U.S. since 1995, not long after the end of the last reintroduction program.
The international popularity of tequila threatens the quantity, health, and biodiversity of all species of agave.
A midden is, among other things, a refuse site outside an octopus' home. (Release the Køkkenmødding!)
We won't solve all of the pressing environmental problems, but we can help mitigate some.
Lichens often go unnoticed, living on the ground, on tree trunks, or on rocks. They're hearty, but remarkably sensitive to air pollution.
The exchange of cancerous cells between organisms is rare. Scientist studied how it happened across species of mussels.
A report from the Australian Koala Foundation declaring koalas "functionally extinct" has caused a confusing scare. What does it mean?
For one thing, there are several species of hazelnuts, including a couple native to North America.
The practice of eating fatty goose livers dates back to at least 2500 BCE. Is there a humane way to produce it?
An entomologist explains why not to.