And even worse fut coins contempo assay has apparent that abate asteroidsare moredestructive than we cool -- the concrete admeasurement of the Tunguska meteor has been revised downwards from avant-garde estimatesdespite its huge adeptness -- two-fifths that of the bigger nuclearbomb anytime built, the Tsar Bomba. Nasa still believes that there are an estimated , asteroids of theaforementioned in the Solar Arrangement that affectation a blackmail…