As part of the Asia Trail exhibit at the National Zoo, this site highlights various facts and interesting information on the Japanese Giant Salamander. In addition to several pictures, the site provides a description and information on habitat, diet, reproduction, and more.

As part of the Amazonia exhibit at the National Zoo, this site highlights various facts and interesting information on the Armadillo. In addition to several pictures, the site provides a description and information on habitat, diet, reproduction, and more.

Get the facts about lemmings. Besides finding a detailed description of the high Arctic's smallest mammal, you?ll also learn about some of its unique facts and characteristics. Also included in this Mammal Fact Sheet on lemmings is information on their habitat and habits, range, feeding, breeding, and conservation efforts. A list of resources completes the fact sheet.

Get the facts about martens. Besides finding a detailed description of this woodland mammal, you?ll also learn about some of its unique facts and characteristics. Also included in this Mammal Fact Sheet on martens is information on their habitat and habits, range, feeding, breeding, and conservation efforts. A list of resources completes the fact sheet.

Meiosis is the process by which gametes (eggs and sperm) are made. Gametes have only one set of chromosomes. Therefore, meiosis involves a reduction in the amount of genetic material. Each gamete has only half the chromosomes of the original germ cell. Explore meiosis with a computer model of dragons. Run meiosis, inspect the chromosomes, then choose gametes to fertilize. Predict the results of the dragon offspring and try to make a dragon without legs. Learn why all siblings do not look alike.

This cell biology lesson explains and illustrated the different phases of meiosis. Includes vocabulary and assessment links as well as othe related resources.

Meiosis is used to make sperm and egg cells. During meiosis, a cell's chromosomes are copied once, but the cell divides twice. During mitosis, the chromosomes are copied once, and the cell divides once. For simplicity, cells are illustrated with only three pairs of chromosomes.

As part of the Amazonia exhibit at the National Zoo, this site highlights various facts and interesting information on the Naked Mole-Rat. In addition to several pictures, the site provides a description and information on habitat, diet, reproduction, and more.

Participate in an online poll to discover what features instinctively guide people when choosing a mate. Consider which traits, both physical and social, are "universally" considered attractive to potential mates, and why.

This article from the companion site to "The Life of Birds" by PBS is full of examples of parenting birds. There is astonishing variety in nest building, offspring rearing, care, and even manipulation and deceit.

A lesson unit on pollination. Includes background information, lessons and activity pages. One handout is in Spanish.

As part of the Amazonia exhibit at the National Zoo, this site highlights various facts and interesting information on the Prehensile-tailed Porcupine. In addition to several pictures, the site provides a description and information on habitat, diet, reproduction, and more.

As part of the Amazonia exhibit at the National Zoo, this site highlights various facts and interesting information on the Prevost's Squirrel. In addition to several pictures, the site provides a description and information on habitat, diet, reproduction, and more.

In this video segment from NatureScene, observe dragonflies and mayflies near Cedar Creek at Congaree Swamp National Park.

A good resource for background into the entire scope of biological development. A list of terms will yield more depth on your choice.

An example of the Red Queen hypothesis, the sexual population of Mexican Poeciliid fish is able to keep up with a changing environment, while the asexual populations are not as successful. From Evolution: "Why Sex?" Video length: 4 min. 12 sec. Includes background reading material and discussion questions.

Get the facts about the Red-breasted Nuthatch. Besides finding a detailed physical description of this forest-found bird, you?ll also learn about some its unique facts and characteristics. Also included in this Bird Fact Sheet on the Red-breasted Nuthatch is information on its habitat and habits, range, feeding, breeding, and conservation efforts. Don?t forget to check out the video clips of this interesting bird using the links near the top of the webpage. A list of resources completes the fact sheet.

As part of the Asia Trail exhibit at the National Zoo, this site highlights various facts and interesting information on the Red pandas. In addition to several pictures, the site provides a description and information on habitat, diet, reproduction, and more.

This video segment from NatureScene describes the characteristics of redwood trees at Redwood National Park.

This video segment from NatureScene describes the characteristics of redwood trees at Redwood National Park. [4:02]