Looking for the legacy site? Click here
a structure or behavior that helps an organism survive and reproduce.

Hardy Gilas

Karla Moeller
The desert is a tough place to live – food may be tough to find, rain only comes in certain seasons, and the temperatures can be hard to handle. How does one special lizard, the Gila monster, deal with these difficulties?

Hydration, Water, and Salts

It’s early July and you’re out for a night hike in the hot, dry Sonoran Desert. You weave your way between cactus and brittle bush, carrying a large pack of water with you. Without water in this desert, you could die within hours to days. Coming around the side of a prickly pear cactus, you suddenly see a small dark shape that stands out in your headlamp. And it certainly sees you—it hisses. You’ve surprised a Gila monster, a venomous lizard found only in North America.

Why Do We Get Sick?

Human heart
Heart disease is the leading cause of death in the United States. Why are the rates of heart disease so high? Image by Jebulon.

War in Your Stomach

Mylan Blomquist

Your stomach is full of tiny organisms that live in peace and harmony with your body – but what happens when the peace is disrupted?

Crazy Climate and Wacky Weather

Darin Kopp

Climate is a hot topic in the news and on internet websites and blogs. But what exactly is climate? And how do we know it is changing?
Also in: Español

Wings in a New Light

The peppered moth lands on the bark of a tree trunk and opens its wings to rest. A hungry flycatcher bird that was close behind swoops down for a meal but loses sight of its prey. The moth blended in with the tree trunk. Blending in let it avoid the pesky flycatcher, so the moth lives to see another day. This may seem like a simple act of nature, but scientists are quite curious about how and why these sorts of interactions arise.

Sooty Selection

Megan Rowton Karla Moeller Robin Greene

Discuss ideas of natural selection, play a selection-based game, and take a trip through time to see how scientists of the past figured out just how a trait is passed from a parent to its offspring.
Also in: Español | Français

Subscribe to Adaptation