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Tunguska event
The Tunguska event was an explosion that occurred at 60 degrees 55'N 101degrees 57'E, near the Podkamennaya (Under Rock) Tunguska River, in what is now Evenk Autonomous Okrug, at 7:17 AM on June 30, 1908. The event is sometimes referred to as the great Siberian explosion.
The explosion was probably caused by the airburst of an asteroid or comet 5 to 10 kilometers (3-6 mi) above the Earth's surface. The energy of the blast was later estimated to be between 10 and 20 megatons of TNT. It felled an estimated 60 million trees over 2,150 square kilometers (830 sq mi). An overhead satellite view centered at 60.917N 101.95E (near ground zero for this event) shows an area of reduced forest density, with a fully visible irregular clearing of somewhat less one square kilometer in area.
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December 12, 2025
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Dec. 10, 2025 New research reveals that Earth’s solid inner core is actually in a superionic state, where carbon atoms flow freely through a solid iron lattice. This unusual behavior makes the core soft, ...
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Dec. 6, 2025 Scientists have discovered that complex life began evolving much earlier than traditional models suggested. Using an expanded molecular clock approach, the team showed that crucial cellular features ...
Dec. 4, 2025 Fresh evidence suggests early Earth wasn’t locked under a rigid stagnant lid but was already experiencing intense subduction. Ancient melt inclusions and advanced simulations point to continents ...
Dec. 3, 2025 Researchers recreated conditions from billions of years ago and found that Earth’s young atmosphere could make key molecules linked to life. These sulfur-rich compounds, including certain amino ...
Dec. 2, 2025 Dolichospermum, a type of cyanobacteria thriving in Lake Erie’s warming waters, has been identified as the surprising culprit behind the lake’s dangerous saxitoxins—some of the most potent ...
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