Rich Murray wrote:
The Tunguska event.
It is the only known example of a low altitude atmospheric
explosion. It is also the largest recorded event. Remarkably no
fragments or significant chemical traces have ever been recovered.
And that wasn't for lack of searching. The Russians dispatched
expeditions to the epicenter early on, when it was easy to find. They
subsequently conducted extensive searches and excavations. As I
recall they send people every year.
Sometimes a lack of evidence is inconclusive because you cannot rule
out the possibility that you have just haven't found it yet. In this
case I expect there really isn't anything to be found.
- Jed
