Polar bears leave thousands of tons of food scraps for other species

anecdote: (adj. anecdotal) An interesting story of a particular event that often is used to impress or entertain others or to serve as an example of what could be a common situation.

Arctic: A region that falls within the Arctic Circle. The edge of that circle is defined as the northernmost point at which the sun is visible on the northern winter solstice and the southernmost point at which the midnight sun can be seen on the northern summer solstice. The high Arctic is that most northerly third of this region. It’s a region dominated by snow cover much of the year.

biologist: A scientist involved in the study of living things.

blubber: The thick layer of fat under a marine mammal’s skin that helps it stay warm even in cold waters. In the past, whalers would boil whale blubber to extract oil, which had many industrial uses.

calorie: The amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. It is typically used as a measurement of the energy contained in some defined amount of food. The exception: when referring to the energy in food, the convention is to call a kilocalorie, or 1,000 of these calories, a “calorie.” Here, a food calorie is the amount of energy needed to raise 1 kilogram of water 1 degree C.

carcass: The body of a dead animal.

carrion: The dead and rotting remains of an animal.

climate change: Long-term, significant change in the climate of Earth. It can happen naturally or in response to human activities, including the burning of fossil fuels and clearing of forests.

coauthor: One of a group (two or more people) who together had prepared a written work, such as a book, report or research paper. Not all coauthors may have contributed equally.

food web: (also known as a food chain) The network of relationships among organisms sharing an ecosystem. Member organisms depend on others within this network as a source of food.

gull: A family of long-winged and relatively thick-bodied shoreline birds. Most are gray and white with webbed feet. They tend to be very vocal.

host: (in biology and medicine) The organism (or environment) in which some other thing resides. (v.) The act of providing a home or environment for something. A website, for instance, could host photos, news or other types of information.

population: (in biology) A group of individuals (belonging to the same species) that lives in a given area.

predator: (adjective: predatory) A creature that preys on other animals for most or all of its food.

prey: (n.) An organism hunted by another, often for food. (v.) To attack and eat another organism.

risk: The chance or mathematical likelihood that some bad thing might happen. For instance, exposure to radiation poses a risk of cancer. Or the hazard — or peril — itself. (For instance: Among cancer risks that the people faced were radiation and drinking water tainted with arsenic.)

scavenger: A creature that feeds on dead or dying organic matter in its environment. Scavengers include vultures, raccoons, dung beetles and some types of flies.

sea: An ocean (or region that is part of an ocean). Unlike lakes and streams, seawater — or ocean water — is salty.

species: A group of similar organisms capable of producing offspring that can survive and reproduce.