* Astronomy

 From June 26-28, Krasnoyarsk, a city in Central Siberia, hosted an all-Russian scientific and practical conference The Centenary of the Tunguska Event.
In the 20th century, Russia was the scene of two major impact events involving large meteorites. On February 12, 1947, a meteorite fell in the Sikhote-Alin mountain range, approximately 440 km. northeast of Vladivostok, Russia, gouging over 30 craters with a diameter of seven to 28 metres and up to six metres deep.
The impact area for this meteorite in the form of iron rain covered about 10 sq. km., from which about 27 metric tons of meteorite substances were recovered. About one per cent of the meteorites initial energy was released during impact, mostly dispersing into the atmosphere.

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Scientists will gather in Siberia to mark the 100th anniversary of the Tunguska Event, one of the world's most puzzling explosions.
The anniversary will be held from June 26-28. The mysterious explosion flattened 80 million trees but largely went unnoticed at the time.

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New Scientist features editor David Cohen narrates his journey to the site of the Tunguska explosion in Siberia.