Petr Semenov-Tian-Shansky’s 194th birthday

Petr Semenov-Tian-Shansky: Explorer of Central Asia’s Natural Wonders and Scientific Pioneer

Petr Semenov-Tian-Shansky (14 January 1827 – 26 February 1914) was a Russian geographer, geologist, and explorer. He is best known…