Topic
Tides
2 articles
Astronomy
Why are there two high tides a day and not one?
The Moon is only ever on one side of Earth, yet the sea climbs the beach twice a day. The second high tide arrives from the direction the Moon is not.
Astronomy
Why do we only ever see one side of the Moon?
Every human being who has ever lived has looked up at the same face of the Moon. The other half stayed hidden until a camera flew behind it in 1959. Something lined the Moon up, and it is still working today.