• Secrets of the system

    Secrets of the system
    When watching the classic racing movies, are you curious how the drivers only need to push a special button, the car suddenly comes off?
  • What is laughter and how is it dangerous?

    What is laughter and how is it dangerous?
    Laughter is a laughing gas, the chemical name is Dinitrogen monoxide or nitrous oxide, which is a chemical compound with the N2O formula. When pumped into balloons, called jokes