2 Module Overview For the past 8,000 years, the ice cores of Antarctica and Greenland indicate that Earthâs climate has been unusually stable. Yet global climate has changed several times in Earthâs geological history, sometimes at a relatively abrupt rate, as shown by the Greenland ice core data. In the module, Temperature Over Time, you compared temperature patterns and trends over different time scales and regions.
It feeds on a wide variety of creatures. Smaller seals probably eat mostly krill, but also squid and fish. Larger leopard seals probably switch from krill to more substantial prey, including king, adelie, rockhopper, gentoo, emperor, and chinstrap penguins, and less frequently, other seals, such as crabeater seal.
What the Great White Shark Eats. Like some of us, the great white prefers a fatty meal to one with lots of protein. That's why its main prey item is the pinniped, an aquatic carnivore like a seal or a sea lion. As we mentioned, humans are generally too muscular and lean for a typical shark meal, but a seal might be 50 percent fat, representing a very efficient meal for great whites [source: Carey ].