Earth is the only known planet with liquid water on its surface, which is essential for life as we know it. Learn more about your ad choices. Visit megaphone.fm/adchoices

The Earth's atmosphere is essential for life, providing oxygen and protecting us from harmful radiation. Learn more about your ad choices. Visit megaphone.fm/adchoices

The Earth's oceans are interconnected and form a continuous body of water. Learn more about your ad choices. Visit megaphone.fm/adchoices