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For centuries, humans have hunted humpback whales. There are only about 35,000 humpbacks left in the world. I’m Howard Rosenbaum, and I hope thatmy research will help preserve this endangered species.

In my research, I travel to Madagascar to observe humpbacks. I can tell the whales apart by their different flukes. Flukes are the broad,flat ends of a whale’s tail.





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Hi, I’m Joel Crew. I study birds, but I’m also crazy about tigers. I have used genetics to study a type of tiger that lives on the island of Sumatrain Indonesia.
My team compared the DNA of Sumatran tigers to that of other kinds of tigers, such as Bengals and Siberians. We discovered that Sumatran tigers are genetically unique.





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Clones are plants and animals that have more than just their looks in common, they also have the exact same DNA sequence. Identical twins are natural clones. They look identical because theyhave the same genes and identical DNA . Today, scientists can even create clones from the cells of an adult animal. These clones are genetically the same as the adult- only much younger.Texto 4


Australia has an unusual variety of living organisms. One reason is its separation from other continents. For millions of years, plants and animals lived in isolation, so Australia has itsown unique ecosystems with species unlike anywhere else on Earth. But some of Australia’s rare species are endangered. We need to gather information about each species quickly, before they becomesextinct





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Earth has over 1.75 million species – over one million of them are insects and spiders. There are many more yet to be identified. All living things are dependent upon oneanother for survival. This variety of life on Earth and its interdependence is called biodiversity.





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The Earth is our home. So far, it is the only place that we know of that has...