re: Possible Tunguska crater found?
Interesting is right.
[The lake bottom's relief has a funnel-like shape not encountered in neighboring lakes, and under 10m the lake shows a disconnection that could be either compacted lake sediments or a fragment of space rock. "We have no positive proof this is an impact crater, but we were able to exclude some other hypotheses, and this led us to our conclusion," lead researcher Professor Giuseppe Longo, told BBC News. ]
Space.com
We'll see in 2008 (that's almost a hundred years since the Tunguska Event: June 30, 1908).