Antarctica is the coldest, windiest, highest, driest, and iciest continent on Earth. It has an average elevation of over 8,000 feet and receives less than 2 inches of precipitation per year. Antarctica is surrounded by ocean, which prevents the moderating effect of water and contributes to its extremely cold temperatures, with recorded lows of -129°F. Several nations operate research stations staffed by scientists year-round to study the environment, climate, and wildlife such as penguins and whales. Tourists can visit Antarctica by ship for short trips during the summer.