In a fascinating discovery, scientists have found evidence suggesting that Earth’s days were once much shorter, measuring just 19 hours. The findings, published in the journal Nature Geoscience, shed light on a period known as the “boring billion,” characterized by minimal tectonic activity and delicate gravitational forces. During this time, biological evolution was constrained, and the moon played a crucial role in shaping Earth’s rotation.
According to the study, the moon’s closer proximity to Earth caused it to exert a stronger gravitational pull. As a result, it gradually drained energy from Earth’s rotation, causing the moon itself to move into a higher orbit. Scientists had previously hypothesized that the moon was gradually lengthening Earth’s days, but this recent research provides further evidence to support the theory.
Computer simulations conducted by the researchers explored the “snowball Earth” era, which occurred between 2 and 1 billion years ago. This period was marked by relative stability and witnessed the Great Oxidation Event, during which oxygen levels increased and the ozone layer formed before declining once again.
It’s important to note that various celestial bodies, including not only the moon but also other planets, influence Earth’s movements in space. Fluctuations in these celestial bodies can affect the rotation of our planet.
Currently, Earth’s days are getting longer at a rate of about 0.000015 seconds per year. The relationship between Earth’s rotation and the moon’s position continues to fascinate researchers as they strive to deepen their understanding of our planet’s past and its intricate interactions with the celestial bodies around it.
