Uncover discoveries from the past by learning about the prehistoric giant short-faced bear. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

A relief map from 1910 showing the southern extent of the Great Ice Sheet in the United States during the Great Ice Age.

Through an overview of past archeological expeditions, the author recounts the "Land Bridge" theory and delves into the life of the first inhabitants of North America.

Uncover discoveries from the past by learning about the prehistoric Jefferson's ground sloth. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric North American scimitar cat. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric ancient caribou. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric Yukon horse. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric North American saiga. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric camels of the Yukon and Alaska. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric Beringian lion and the American lion that evolved from it. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and...

In this interactive tutorial, you will learn about glaciers - rivers of ice. Learn about the features caused by moving glaciers.

This video segment adapted from NOVA explains the difference between weather and climate and features groundbreaking analysis revealing that Earth's climate has changed much faster than previously believed. [5:48]

Detailed analysis of the spread of malaria in England owing to changes in climate during the sixteenth and seventeenth centuries.

This is Chapter One from "Becoming Human: Evolution and Human Uniqueness," by Ian Tattersall. This chapter presents recent findings about the art and artifacts of early humans, and what those artifacts tell us about the intellectual...

Investigate glaciers past and present through this website that explores glaciers found in the National Park Service.

This virtual field trip for middle school students looks at aquifers and their place in the hydrologic cycle. Students learn why and how it is important to protect the source of your drinking water and some unique details about the...

The Discovery Channel provides numerous lesson plans dealing with plants. Content is organized by grade level, but all lesson plans include suggestions for adaptations for older or younger audiences.

Material to begin an exploration of the sand formation, landforms, and underground water. An hour-long video is accompanied by learning goals, an outline and overview, details on the ice ages, glaciers, and glacial landforms, and ideas...

An account of the pre-European lives of the indigenous tribes of Arkansas. The time period covered extends from the Ice Age to the arrival of Spaniard De Soto.

Discover 10 interesting things about Earth, including its shape, its seasons, rotation, Ice Ages, the Atacama Desert, gravity, changing sea levels, and the Moon.

The last ice age exposed the ocean floor between Asia and North America for thousands of years. During this time, Nomadic tribes from Asia used the "land bridge" to migrate into North America.

Pizza, milk shakes, and ice cream sundaes all contain dairy products, therefore they cannot be eaten by the majority of people around the world. Dairy products contain the sugar molecule lactose, and the majority of people on the planet...

In this article about global warming, learn how the warming climate could affect the polar ice caps, glaciers, sea ice, and amount of freshwater entering the polar oceans. Read how some scientists believe global warming could add to...

[Free Registration/Login may be required to access all resource tools.] How in the most recent age, Pangaea broke apart and made modern plate tectonics.