Large-scale extinction of land-dwelling animals occurs over a 27-million-year cycle

According to a new analysis published in the journal, large-scale extinctions of land-colonized animals, including amphibians, reptiles, mammals and birds, are taking place in conjunction with previously reported mass extinctions of marine life. .Historical Biology.

The study also found that this mass extinction is aligned with asteroid effects and destructive volcanic eruptions of flood-basalt eruption lava – providing possible reasons why this extinction occurred.

“It looks like the pulses, the extinction of large-body influences and the internal activities that produce the inner bestal volcano, could be heading for a 27-million-year-old drumbeat, probably driven by our orbit in the galaxy,” said Michael Rampino. , Professor in the Department of Biology at New York University and lead author of the study.

As a result of the catastrophic collision of a giant asteroid or a comet with the Earth, 70 percent of all species on land and at sea, including dinosaurs, suddenly became extinct 60 million years ago. Subsequently, paleontologists discovered that such a large extinction of marine life, in which 90% of species have disappeared, is not a random event, but appears to have occurred in a 26-million-year cycle.

In them .Historical Biology The study, by Rampino and co-authors Ken Ken Caldeira of the Carnegie Institution of Science and Yuanggang Zhou of the Center for Data Science at NYU, examined records of large-scale extinction of land-dwelling animals and concluded that they are associated with marine life. They also performed a new statistical analysis of the extinction of land species and showed that these events follow a similar cycle of about 27.5 million years.

What could be the reason for the periodic large-scale extinction of land and sea? Mass extinctions are not just events that occur in cycles: the effects created by Aster ters aids and comets crashing on the Earth’s surface યુ the age of craters પણ also follow a cycle aligned with the extinction cycle.

Astrophysicists estimate that periodic comet precipitation occurs in the solar system every 26 to 30 million years, producing cyclonic effects and periodic mass extinctions. The Milky Way galaxy orbits the sun and planets in about 30 million years. During that time, comet rain is possible, causing a major impact on Earth. The effects could create conditions that would stress and potentially cut off land and marine life, including widespread black and cold, wildfires, acid rain, and ozone depletion.

“These new findings of monotonous, sudden mass extinctions on land and in the oceans, and cycles of 26 to 27 million years in general, periodically support the notion of global catastrophic events as reasons for extinction.” Rampino. “In fact, three mass extinctions of species on land and at sea have occurred at the same time as the three largest influences of the previous 250 million years, each capable of causing global extinction and resulting in mass extinction.”

Researchers were surprised to find possible explanations other than for massive extinction asteroids: flood-basalt eruptions, or massive volcanic eruptions covering large areas with lava. All aggregate aggregates matching the time of flood-basalt eruption on land and in the oceans. These eruptions would also have created severe conditions for life, including severe cold, acid rain and ozone depletion and increased radiation; Long-term, outbreaks can lead to deadly greenhouse heat and more acid and less oxygen in the ocean.

Rampino added, “The global mass extinction was apparently caused by the biggest catastrophic effects and large-scale volcanoes, perhaps occasionally operating in Jalsa.”