Скачать или смотреть Something Inside the Earth is "Stretching" the Length of a Day

The length of a day on Earth is not constant. Hidden "forces" within the planet are subtly stretching or shortening the duration of a day in various cycles, revealing unresolved mysteries about Earth's internal geodynamics.A new study from the Swiss Federal Institute of Technology (ETH Zürich) has uncovered a mysterious cycle affecting the length of a day. According to Science Alert, scientists have long known that a day is not precisely 24 hours. Instead, it fluctuates due to three primary factors.First, on a century scale, the duration of a day changes by approximately 1.72 milliseconds per 100 years. This is caused by the gradual expansion of Earth’s crust as ancient ice sheets melt, combined with the gravitational effects of the Moon.