From leaf margin and arrangement to the parts of a flower and a corn seedling, take an illustrated look at plant morphology with this collection of guides.

If the West Antarctic Ice Sheet breaks apart, it could release enough water to raise the sea level by six meters (19.7 feet). Meet a scientist studying the ice sheet's past in order to predict its future.

It takes only about a month for any change in Antarctica's weather to be felt in North America—pretty remarkable when you consider that Antarctica is 12,874 kilometers (8,000 miles) away.

What's a high school chemistry teacher from Florida doing in Antarctica studying the winds? She's helping researchers understand global warming by tracking how the winds transport snow.

Journey to the Sonoran Desert in southern Arizona with this seventh-grader for an up-close and personal look at the saguaro cactus, which can live about 200 years and grow to be almost 80 feet tall.

Siple's Antarctic trips are legendary. At 10, he was selected in a nationwide Boy Scout search to travel there. Several decades later, he was part of the first group to winter over at the South Pole.

Talk about the force of gravity—Antarctica's powerful katabatic winds thunder down from the high polar plateau to the coast, creating wind speeds that typically exceed 100 mph every winter month.

For three months in the early 1800s, earthquakes shook two pioneer towns in Missouri—and permanently changed the course of the Mississippi River. Relive that time with this 12th-grader from Wisconsin.

Getting lost "somewhere between North Dakota and Montana" during a family road trip led this 11th-grader from Wisconsin to a picturesque landscape, rich with geologic discoveries.

Millions of years ago, coral and algae thrived in the shallow sea that once covered Oklahoma's rocky, tree-covered hills and grassy plains. Explore the state's geologic past with this 10th-grader.