1995 i believe.
Babylonians
2013
Why would it be hard to discover a planet that is closer to the sun than mercury
josh wickam
1623
1230
BAROMETER ---- It's actually a mercury barometer
Mercury is a chemical element known from the antiquity (more than 4 000 years ago) in China, India or Egypt.
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A year on Mercury is about 88 Earth days long
There are 88 Earth days in Mercury's year