China successfully landed their test reusable spacecraft yesterday, May 8.After staying in orbit for 275 days

The scene in this photo is of a dinosaur fossil skull on a large rock being airlifted from the Red Willow River Valley using a helicopter. 72-year-old unidentified dinosaur partial skull fossil found in sandstone block The fossil was obtained...

The skeletons of humans and gorillas have the same basic structure. If we know the bones of the human skeleton, we can also know the parts of the gorilla skeleton. However, there are significant differences between the shape and proportions...

At present, the number of living things on earth is 800 billion, with only a quarter of a trillion (1,250,000,000,000) stars per adult! Think about it, every human being in this world, including you and me, is not one or...