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.
Harbor seals live in a larger area than any other kind of seal, sea lion, or walrus. They are native to the east and west coasts of the Pacific and Atlantic Oceans in the Northern Hemisphere. They live along the western Pacific Ocean coast north to the Gulf of Alaska and to the southeastern Bering Sea.