Controlling Genes

Almost all of our cells contain identical copies of DNA. But wait...with the same instructions, shouldn't all cells look and function the same? Learn how our bodies use the same instructions to make all kinds of different cells.
Also in: Español | Italiano

How Do We Sense Touch?

Humans interact with their environment using their sense of touch. This story explores how touch works.

Also in: Español | Français

Cells Living in Cells

Everything that is alive is made of cells, but there are really only two main types of cells. Learn how these cell types became different and why they are so important to life.
Also in: Español | Italiano | 简体中文

Crazy Climate and Wacky Weather

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

How Do We Hear?

Whether a friend whispers in your ear, or you hear a jet flying high in the sky, sound is all around you. But how does a tiny sound wave change from waves in the air to sounds or sentences that we can understand?
Also in: Français | Español

Phosphate Fix

You may know that plants need air, water, and sunlight to survive. But they also need a special molecule called phosphate. Learn more about phosphate, plants, and why genetic modification may be able to fix some of our plant problems.
Also in: Español

Taking Care of Nature

Humans are constantly changing the world. This can be in good ways, but sometimes it is also in bad ways, like with pollution. Learn the ways in which we can help the world around us by understanding how we affect nature.
Also in: Español

Biology's Beginnings

The study of biology is such a part of our lives today, it's hard to think that there may have been a time when that wasn't the case. Take a trip back through time to see when the study of biology began.
Also in: Español | Français

The Peppered Moth: A Seasoned Survivor

The colorful wings of butterflies and moths aren't just part of a beauty contest.  Learn how these changes in coloration have allowed species like the peppered moth to survive in an ever-changing environment.
Also in: Deutsch | Español

How Do We See?

Have you ever wondered how an image is seen by your eyes, and how your eyes can tell your brain what they are seeing? Learn all about how your eyes and brain work together to show you the world.
Also in: Español | Français