Ancient days were shorter.
American scientists have found that the duration of the earth day is associated with the distance from the earth to the moon. Thus they were able to detect that early day on the Earth lasted for 6 hours less than now.
How long was a day on Earth? 1.5 billion years ago a day on the planet lasted for about 18 hours. Then the Month was 44 000 kilometers closer to Earth than it is now – this distance is approximately equal to the length of the equator, according to PNAS.
What affects the length of a day? Scientists have studied rocks age of 90 million years and reconstruct the processes of climate change in the Proterozoic, which began about 2.5 billion years ago and lasted for almost 2 billion years. They found that the movement of the Earth affect other space bodies including the Moon.
When the distance between the Moon and Earth began to change, it affected the rotation of the planet around its axis, which is reflected in the duration of the earth day and climate.
“When the Moon moves away, Earth slows its rotation like a skater who extends his arms,” – said study leader, Professor Stephen Myers.
The satellite of our planet away from her with a speed of 38 millimeters per year. So the days on Earth will continue to get longer, but it will become noticeable only after millions of years.
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