Or, for a medical example, suppose smoking multiplies the risk of lung cancer by some number R: then the Wald test can be used to test whether R = 1 (i.e. there is no effect of smoking) or is greater (or less) than 1 (i.e. smoking alters risk).
There are more than 900 species of Tardigrade or Water Bear, pictured. They're found everywhere in the world, from the highest mountains to the deepest oceans. Boil the 1mm creatures, freeze them, dry them, expose them to radiation and they're so resilient they'll still be alive 200 years later.
Polar Bear. Polar bears live in cold weather where they can hunt seals. These seals are hunted in the opening sea ice called leads. They live in the U.S. (Alaska), Canada, Russia, Norway, and Greenland.Many people think that polar bears live in Antarctica, but they do not; penguins do.Polar Bears habitats have been coming endangered.This is due to the climate changes and greenhouse emissions.hey live in the U.S. (Alaska), Canada, Russia, Norway, and Greenland. Many people think that polar bears live in Antarctica, but they do not; penguins do. Polar Bears habitats have been coming endangered. This is due to the climate changes and greenhouse emissions.