Hu Q&A: Why do tightly tied shoelaces loosen by themselves?

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Hanmu Diaomeng, how do planes keep flying straight on the runway?

King Yi Yidu, why do tightly tied shoelaces loosen by themselves?

Nutcracker Studio, should you lower your head or raise your head after a nosebleed?

Liu Qiongyao, there is definitely something you don’t know about Beijing Time!

Su Chengyu, eating dark chocolate is like tasting...

The next issue will present you with more interesting questions. If you have any soul-searching questions that you can’t wait to know, or any strange ideas that make no sense, you can leave us a message.

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Source: China Science Expo