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How do we know which way is up and how do we know which way is down?

In: Science [Edit categories]

Answer:

A1. the sky is always up and the ground is down it is so simple ;)

answ2. Although we commonly refer to the five senses, we have many more, and the ability to sense gravity is one of them.
Done with clever bits attached to the middle ear.

Very early in embryonic development, a neural groove appears in the embryo, and this is associated with the development of the nervous system.
This may be the start of a gravity sensor, as well as the hearing organs.

We well know that birds eggs must be turned over regularly in order for the embryo to develop. So gravity affects the development of at least bird's embryos.

First answer by ID1342230876. Last edit by Suma rongi. Contributor trust: 157 [recommend contributor ]. Question popularity: 2 [recommend question].

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