Here's a fun way to cheat on your next biochemistry exam

A mountain in Kermânshâh, west Iran.

There are over 12,000 species of ants in the world, and a new tree of life has been published to better understand how they are all related. Their evolutionary origins have been traced to the tropics in South America, where they play a critical role in maintaining the health of the ecosystem.

This is a white-blooded ice fish, or "crocodile fish" (Chaenocephalus aceratus). They lack both red blood cells and hemoglobin, and so have white blood. They have translucent bodies, and absorb oxygen directly from the water around them.

Human babies and mouse pups both automatically and deeply relax when carried by their mums, new research has revealed. The study showed the babies' heart rates slowed down and their nervous and motor systems relaxed when they were carried, suggesting it doesn't just feel good, its an essential mother-infant interaction.

Inca terns are unique and beautiful birds—slender with white-tipped gray feathers, a white curly moustache, yellow lips and a bright orange-red bill. They have a distinctive call that sounds like a high pitched laugh, which is often accompanied by bowing gestures.

Inca terns are natives of the western shoreline of South America and the islands located offshore. They are especially abundant in northern Chile and Peru in the summer. They migrate in winter, venturing to Ecuador and central Chile.

Inca terns swoop down and pluck fish from near the water’s surface. They also sometimes get scraps left behind by whales, or flock to where sea lions are eating on rocks, to steal stray bits of food.
 
A male who is interested in a female will perform aer ...