A recent study from the University of California, Berkeley revealed that over the course of a few million years, about 2.5 billion Tyrannosaurus rex dinosaurs roamed the Earth.
The study took into account the 127,000 generations, the 1.2 million to 3.6 million years of their existence, along with the sexual maturity of 14 to 17 years and the maximum lifespan of 28 years. Due to the size of the T-Rex, the carnivore was also found to require a significant amount of energy, which ultimately means a lower population density – it was calculated that there were an estimated two in a place the size of Washington, DC, or 3800 in California.
While this is only a rough estimate with a wide margin of error, it provides a sufficient reason why only about 100 fossils have been found. Charles Marshall, director of the University of California Museum of Paleontology, notes that if there had been only 2.5 million T. rexes instead of 2.5 billion, we probably never would have known they existed.
In other news, Google Earth is introducing 4D timelapse showing how humans are slowly killing the planet.