How was Helium gas generated?
If you pump Helium gas into the balloon and release them, this ball will fly to a maximum height of under 10km.
Latest update
- Interesting things about taxes in ancient Egypt
- Explore the structure and operating principles of ball mills
- Trees full of bras and bicycles in the middle of the road are strange in Australia
- The Perseverance probe marks its 1,000th day on Mars
- This bizarre photo of the Moon was taken by a pair of Chinese test satellites
- South Korea launched its first nanosatellite
- South African cobra swallows poisonous snakes
- A mother turtle weighing nearly 100kg came from Malaysia to Con Dao to lay eggs