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.
Today, our polar bears live in a wonderful tundra habitat complex: the Conrad Prebys Polar Bear Plunge. The focal point of the Plunge is, naturally, the pool. From the underwater viewing room, you can see how agile and playful these Arctic bruins really are.oday, our polar bears live in a wonderful tundra habitat complex: the Conrad Prebys Polar Bear Plunge. The focal point of the Plunge is, naturally, the pool. From the underwater viewing room, you can see how agile and playful these Arctic bruins really are.