A recent study done by scientists in America has shown that days on earth are getting longer and in million years from now, a day will last 25 hours on earth.
However, the process will take 200 million years in stretching hours of the day to 25 hours from 24.
The study done by scientists at the University of Wisconsin-Madison has said that the reason of this is the moon as it is moving away from the earth, affecting the earth spins on its axis.
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According to the research, currently, the moon is pulling away at the rate of 3.82 centimetres a year. The scientists further said that over a few billion years it Moon has slowly moved away from the earth slowing the earth's spin.
Researchers at Durham University and the United Kingdom's nautical almanac office also said that the day is lengthening by two milliseconds every 100 years and getting an extra minute in a day will take 6.7 million years.
They studied some 1.4 billion-year-old rock layers in northern China, known as the xiamaling formation, to determine what the earth was doing at the point in history, including the length of its days and distance from the moon.    
According to the research, 1.4 billion years ago a day on earth used to last for 18 hours.
The scientists' conclusions came through a new tool which combined astronomical theory, geologic data and a sophisticated statistical approach.  It enabled them to account for the uncertainty in the earth-moon relationship when studying rock samples.  
 
As someone deeply engrossed in Earth's celestial mechanics and its historical changes, I'm fascinated by the recent study detailing the elongation of Earth's days. The research conducted by scientists at the University of Wisconsin-Madison aligns with numerous studies I've encountered that corroborate this intriguing phenomenon.
The key aspect driving the lengthening of Earth's day by an additional hour over millions of years is the gradual movement of the Moon away from our planet. The idea isn't novel; it stems from the understanding of tidal interactions between Earth and the Moon. This interaction causes a transfer of angular momentum, leading to a slowdown in Earth's rotation as the Moon gradually moves away. This process has been studied and modeled extensively, integrating astronomical theories and geological data to track the historical relationship between Earth and its satellite.
The rate at which the Moon is currently drifting away, approximately 3.82 centimeters per year, directly impacts Earth's spin on its axis. This relatively slow but consistent pace of lunar recession contributes to the gradual lengthening of our days. Moreover, the research extends its insights to historical periods, citing the study of the xiamaling formation in northern China, approximately 1.4 billion years old, which reveals that a day on Earth lasted merely 18 hours at that time.
This profound understanding has been attained through a sophisticated combination of astronomical theory, geological evidence, and advanced statistical methodologies. It's notable that these methods accommodate uncertainties in the Earth-Moon relationship, providing a robust framework to analyze and comprehend the changes in our planet's rotational dynamics over vast timescales.
The contributions from researchers at Durham University and the UK's nautical almanac office further bolster this understanding, demonstrating how Earth's day lengthens by two milliseconds every century. This minute addition to a day, amounting to an extra minute over 6.7 million years, emphasizes the gradual yet consistent nature of this transformation.
This comprehensive and multi-disciplinary approach to studying the Earth-Moon relationship showcases the evolving sophistication in scientific methodologies, enabling us to peer into Earth's distant past and project its potential future, where a day on Earth might extend to 25 hours in around 200 million years.
