The date is January 11, 1911. A young German paleontologist, accompanied only by a guide, a cook, and four camels, reaches the vast Bahariya Depression after a long trek across the western desert of Egypt. Ernst Freiherr Stromer von Reichenbach hopes to find fossil evidence of early mammals. At the bottom of the Bahariya Depression, Stromer will find the remains of four entirely new dinosaurs, along with dozens of other unique specimens. But there will be reversals - shipments delayed for years, fossils shattered, stunning setbacks. Then, in a single cataclysmic night, all of his work will be destroyed, and Ernst Stromer will slip into history and be forgotten.The date is January 11, 2000 - 89 years to the day after Stromer descended into Bahariya. Another young paleontologist, American graduate student Josh Smith, has brought a team of fellow scientists to Egypt to find Stromer's dinosaur graveyard. After weeks of digging, they fail utterly. Then, just when they are about to declare defeat, Smith's team discovers a dinosaur of such staggering immensity that it will stun the world of paleontology and make headlines around the globe.Masterfully weaving together history, science, and human drama, The Lost Dinosaurs of Egypt is the gripping account of not one but two of the 20th century's great expeditions of discovery. 1. Language: English. Narrator: Michael C. Hall. Audio sample: http://samples.audible.de/bk/rand/000247/bk_rand_000247_sample.mp3. Digital audiobook in aax.
Ejnar Hertzsprung was a Danish chemist and astronomer.Hertzsprung was born at Copenhagen. In the period 1911-1913, together with Henry Norris Russell, he developed the Hertzsprung-Russell diagram.In 1913 he determined the distances to several Cepheid variable stars by statistical parallax, and was thus able to calibrate the relationship discovered by Henrietta Leavitt between Cepheid period and luminosity. In this determination he made a mistake, possibly a slip of the pen, putting the stars 10 times too close. He used this relationship to estimate the distance to the Small Magellanic Cloud.From 1919 to 1946 Hertzsprung worked at Leiden Observatory in The Netherlands, from 1937 as director. Perhaps his greatest contribution to astronomy was the development of a classification system for stars to divide them by spectral type, stage in their development, and luminosity. The so-called "Hertzsprung-Russell Diagram" was used for many years as a classification system to explain stellar types and evolution.He discovered two asteroids, one of which is the Amor asteroid 1627 Ivar.Hertzsprung died in Roskilde in 1967.