Dinosaurs could not hear humans

If a Tyrannosaurus rex lived and crossed on our way, not hear our cries. This was confirmed by a study conducted by Otto Gteich and his team at the University of Regensburg in Germany.

To calculate the limits of hearing 7 rex, analyzed the ear of birds descended from dinosaurs. Scientists found that the frequency range of hearing in birds is inversely proportional to its body mass and length of their basilar papilla, a structure key to the inner ear.
Apparently, the species with small papillae Corlar better hear high frequencies. Because fossils do not preserve this part of the ear, experts measured through cloquear, that it is preserved in Archaeoptetyx-an early-bird, alosaurios and braquiosaurios.

In these fossils is that through third longer than the birds. In conclusion, concluded that the Archaeoptetyx had a hearing similar to modern birds.

For its part, a alosaurio of 1.4 tons oiria frequencies between 1.1 and 3 kHz, and a braquiosaurio of between 700 hertz and 2.4 kHz. The range of tyrannosaurus would be between the two. As the cry of a human exceeds 3 kHz, the animal could spend over without hearing our complaints.

Giant Toad that cohabited with the Dinosaurs

According to an article published in the scientific magazine Proceedings of National the Academy of Science, a group of paleontologists has discovered in Madagascar the fossil of a giant toad that measure 40,6 centimeters and you weigh 4,5 kilograms and that you lived about 70 ago
millions of years among the dinosaurs in África.

The toad, with a thick shell and with teeth, you were such an extraordinary amphibian that you would even putrefy book credit devoured to
newly born dinosaurs. This, you have made the paleontologists name it as diabolical" "toad. According to your discoverers, this amphibian belongs to the family of toads that he live nowadays in America of the South.

The fossils of the toad date of final of the Cretaceous period, on or about about 70 million years behind.

Currently, the biggest frog in the world is the one that are named Goliath, of western África that can end up measuring 32 centimeters and to weigh 3,3 kilograms.

With your features, the diabolical" "toad could be the biggest toad that have existed never, the paleontologists they affirm.

The discovery, also, would prove that you had to have existed some terrestrial connection with America of the South in that time, maybe through Antartic, then much hotter that today.