Pyotr Semyonov-Tyan-Shan span>
Petr Petrovich Semenov was born (2) on January 14 in 1827 in the village of Urusovo, near Ryazan, the son of a retired captain, a member of the battle of Borodino.
In 1848, he graduated from the University of Semenov and decided to do science. In 1853 he began to lecture on the geography and geology at the University of Berlin. Here he has the idea of ??exploring the Tien Shan, prompted by .
In 1856, Semenov made his first expedition, and in 1857 — the second. He has collected a wealth of material, including unfamiliar species science, gave the name of Trans-Ili Alatau. The expedition was successful, but did not achieve its main goal — to prove the volcanic origin of the Tien Shan. 50 years later, in 1906, when the scientific study of the mountain, to the name of Semenov was added "Tien-Shan».
From 1873 to 1914 he was head Semenov Russian Geographical Society. He participated in the organization of scientific expeditions , Potanin, Kozlova, VIRoborovsky Velihanova, Mushketova, .
From the pen of Semenov-Tyan-Shan came out capital works on geography, he assembled a unique collection of insects (about 700,000 copies), as well as a rich collection of paintings by Dutch artists who later handed over to the Hermitage (this more than a hundred paintings and engravings of several thousand).
In 1897, he organized the first general census of the population of Russia. Economic and statistical work of Semenov-Tyan-Shan enjoyed and Lenin.
Died scientist Pyotr Semyonov-Tyan-Shan ( February 26) March 11 in 1914 in St. Petersburg.
In honor of it listed a number of geographical features in the Middle East and Central Asia, the Caucasus, Alaska and Svalbard, and about 100 new forms of plants and animals. Established Gold Medal. Semenov-Tyan-Shan.