Revealing the mysteries of the Earth makes everyone 'startled'
Although humans set foot on the moon, launch other planetary spacecraft, but there are countless mysteries on Earth that we have not 'deciphered'.Why can heavy aircraft fly like birds?
The largest commercial aircraft in the world can weigh up to under 500 tons, while the largest bird that can fly currently has a body weight of only about 16kg.The moon is shrinking
NASA scientists say the Moon is moving away from Earth and shrinking but still under the influence of Earth's gravity.