Did Changes in the Universe’s Physics Kill the Dinosaurs? A New Theory Emerges


Since the discovery of dinosaurs, scientists have wondered what led to their extinction. The leading theory suggests an asteroid impact caused their demise.

Other theories propose that volcanic eruptions made the planet uninhabitable.

However, a new and unconventional idea has surfaced, suggesting a fundamental change in the laws of physics could be responsible.

The Hubble Constant and the Expanding Universe

To understand this theory, we need to talk about the Hubble Constant, which measures how fast the universe is expanding.

Scientists calculate this by looking at the distance and speed of galaxies, quasars, and supernovae.

Another method involves studying the cosmic microwave background, which shows the universe’s expansion rate shortly after the Big Bang.

These methods give different results, indicating the universe is expanding faster than we thought.

This discrepancy has led to new theories like dark energy, but these have not been entirely satisfactory.

A Radical New Idea from Professor Leandros Perivolaropoulos

Professor Leandros Perivolaropoulos from the University of Ioannina, Greece, proposes an unusual theory that might explain these discrepancies and also the extinction of dinosaurs.

In his paper, “Is the Hubble crisis connected with the extinction of dinosaurs?” (not yet peer-reviewed), he suggests that the strength of gravity increased by 10 percent over 100 million years, ending 50 million years ago.

This idea involves a concept called a “false vacuum,” which is like a local bubble of low energy that appears stable but isn’t.

If this false vacuum collapsed into a true vacuum with lower energy, it could have changed the strength of gravity.

How This Theory Connects to Dinosaur Extinction

According to Perivolaropoulos, a 10 percent increase in gravity would have disturbed the Oort cloud—a distant region filled with icy objects surrounding our solar system.

This disturbance could have sent more objects, like comets, hurtling towards Earth. He believes this increased impact rate can be observed in the geological record.

He suggests that this increase in gravity could explain why we see more impacts on Earth and the Moon over the past 100 million years.

One of these impacts, he argues, might have caused the mass extinction event that wiped out the dinosaurs.

Skepticism and Potential Proof

While the idea is intriguing, many scientists are skeptical.

Astronomer Ben Montet from the University of New South Wales points out that we should see evidence of this gravitational change in the orbits of planets and in geological records on Earth, Mars, and Venus.

Additionally, the asteroid that killed the dinosaurs was not a comet from the Oort cloud, which casts doubt on this theory.

Perivolaropoulos acknowledges the lack of evidence but suggests ways to test his theory.

He proposes looking for unexplained temperature changes on Earth over the past 150 million years or studying the rotation of local galaxies for signs of this gravitational shift.


This theory, while speculative, adds an interesting perspective to our understanding of the universe and the extinction of the dinosaurs.

Further research could either validate or debunk this idea, shedding more light on the mysteries of our universe.