In the simulations, a tight ring of polar vortices forms at around 55 degrees latitude, the equivalent of Earth’s Arctic circle. After forming, the vortices head toward the poles in a tightening ring, ...

An elephant family comforts their calf during an afternoon nap under a tree in Samburu National Reserve, Kenya. Credit: George Wittemyer/Colorado State University ...

Savanna elephants are surveyed by spotters in planes. A new study found large-scale declines in African elephants in the first continent-wide analysis of population survey data. Credit: George Wittemy ...

As several families cross the Ewaso Ngiro River, a female elephant responds to her calf’s distress call. Credit: George Wittemyer/Colorado State University ...

A mother elephant leads her calf away from danger in northern Kenya. Credit: George Wittemyer/Colorado State University ...