Tropical rainforests are woodlands around the equator with a lot of vegetation that is evergreen. It is very warm and rain falls throughout the year.
Some animals and plants in our world are very common, like houseflies, cats or daisies. They are not in danger of dying out. Other species are very rare. Sometimes only a few of them are left. Such species may disappear forever.
Antarctica is the continent around the earth’s South Pole. It is covered with thick sheets of ice the whole year round.
Whales have been hunted for their meat and oil for centuries. In the 18th and 19th century, whaling became an industry. As time went on, whaling fleets caught more whales than the animals could reproduce.