For thousands of years, millions of monarch butterflies have migrated from the northern U.S. and Canada to Mexico for the winter. But exactly how they know where to go is still a mystery.

Monarchs traveled to a remote part of Mexico, a journey they've made for thousands of years, and wintered there. Now tens of millions of the butterflies are on an epic aerial journey back north.

A new butterfly species, Satyrium curiosolus, was discovered in a recent study at Blakiston Fan in Waterton Lakes National Park, Alberta. It has unique evolutionary history, having likely remained in ...

Sir Keir Starmer has unveiled what he says is a major transport boost to stop the North being "held to ransom" by a Victorian-era system. The prime minister said the £2.15bn investment was a ...

Although the researchers – who collaborated across the country – saw a 22% decline in the total number of butterflies, they ...

Scientists on an icebreaker ship have captured a number of weird and wacky animals from Antarctica's ocean floor, including a bizarre pig-shaped creature.