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 have been roaming the earth.
The research included in 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 a maximum lifespan of 28 years. Due to the size of the T-Rex, it was also determined that the carnivore required a significant amount of energy, which ultimately meant a lower population density – it was estimated that there were two estimated at a place as large as Washington DC, or 3,800 in California.
Although this is only a rough estimate with a large margin of error, it gives sufficient reason why only about 100 fossils have been found. Charles Marshall, director of the University of California Museum of Paleontology, says that if there were only 2.5 million T. rexes instead of 2.5 billion, we would never know it existed.
In other news, Google Earth introduces 4D timelapse showing how humans are slowly killing the planet.