The North American plants look pretty, but they also causes havoc in places where humans have allowed them to spread.

Rising sea levels may cause the local extinction of three small, threatened vertebrates in southern Brazil.

Wood-pellet companies have devastated forests in the Southeast and New England. Now they’re looking to expand.

Ramanujam, you see, is a researcher studying the Indian eagle owl ( Bubo bengalensis ). He’s also a philatelist, the term for ...