The researchers used a statistical method for the study, called astrochronology i.e.
However, witnessing the impact of these variations on our planet's climate rhythm was not that easy, particularly on a scale going past a few hundred million years.
For billions of years, the moon is making days longer as it is moving away from Earth causing it to move slowly. The system allowed the team to paint a rough picture of what a day on Earth might have been like over a billion years in the past, and better explain the evidence of climate shifts that have been observed in ancient rocks.
For instance, the moon was now moving away from Earth at a rate of 3.82cm per year. Meyer and his team also analyzed some sediments in a 90 million-year-old rock.
Using such an approach, Meyers and colleagues assessed variations in Earth's axis of rotation both in more recent and earlier times, while also addressing uncertainty.
Over the course of a billion years, the moon has been moving away from the earth, resulting in the blue planet moving slowly over time.
Assuming that rate of movement has been constant, the moon would have been so close to the planet 1.5 billion years ago that the Earth's gravity should have ripped it apart. Using this model, they tested two rock layers from the 1.4 billion-year-old Xiamaling Formation in northern China and another from the 55 million year old record from Walvis Ridge, in the south Atlantic Ocean.
Examining the geologic record captured in the rock layers and integrating the measure of uncertainty revealed changes in Earth's rotation, orbit and distance from the moon throughout history, as well as how the length of day on Earth has steadily increased.
These complications and the number of variables that went into accurately measuring Milankovitch cycles and the Earth on the whole.
Meyers brought the problem to a presentation he gave at Columbia's Lamont-Doherty Earth Observatory in 2016.
Climate change, in turn, leave a mark in the geological record.
Normally, Crampton said, changes in Earth's orbit would be calculated by astronomers, rather than palaeontologists.
Once on the Ground half a billion years ago, you wouldn't know their home planet because the day was shorter then than now, for six hours. "We are looking at its pulsing rhythm, preserved in the rock and the history of life".