sentences:  In July 2008, Russia announced it was sending "Mir" submersibles to descend one mile to the bottom of Lake Baikal to conduct geological and biological tests on its unique ecosystem.Chilingarov is scheduled to join in 60 dives in total.On July 29, 2008, Chilingarov took part in a dive to a depth of 1,580 meters in Lake Baikal, just short of the record 1,637 meters.