Using two species of flies from different climates -- one from the cool, high-altitude forests of Northern California, the other hailing from the hot, dry deserts of the Southwest -- scientists ...

A very thirsty animal can drink 30 gallons of water ... Large, tough lips enable them to pick at dry and thorny desert vegetation. Big, thick footpads help them navigate the rough rocky terrain ...

A hot desert is often covered in sand and the plants and animals that live there are adapted to live in very hot and dry conditions. Wow! It looks like it hardly ever rains here. Incredibly ...