Asteroids: Deadly Impact

Asteroids: Deadly Impact
45:00 | 1997

Categories: Science and Environment

Every year, millions of asteroids and comets or ''stray bullets'' streak through the skies, and tons of small meteorites strike our planet! Some 65 million years ago, dinosaurs were wiped off the face of the earth, in what many believe was the aftermath of a massive cosmic collision. Could something like this happen again? Scientists believe that the impact of an asteroid only a mile wide would be globally catastrophic. Join extraordinary geologist Eugene Shoemaker and his wife Carolyn who have remapped the heavens with their discoveries of more than 30 comets and hundreds of asteroids. Now that we know what's out there, how can we defend ourselves?

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Comments

Jelena Djajic Petojevic
j********m
February 24, 2015
A
null
d********m
January 30, 2015
A
William Saunders
z********m
February 18, 2014
cool
Wally Pratt
w********m
January 29, 2014
B+
wallace gene
w********m
December 18, 2013
A-
Nicole Singleton
n********m
June 10, 2012
Okay..but where is the ROCK? Is it underground? We can easily detect if the rock is there (underground) so why aren't we talking about it?
Goderick Villadelgado
1********g
June 10, 2012
Because it's smashed to bits...
Nicole Singleton
n********m
June 11, 2012
Not all the way...They would have found the rock somewhere in the middle below the surface. How do we know all of these are made by an asteroid? Some might have been made by volcanic activity, physicist smarty pants :)
Benjamin Johnson
6********g
April 17, 2012
The world united has enough firepower to destroy a threatening alien object. The most destructive force known is the sun. That's what I would would worry about!
Mark Ruble
1********g
April 10, 2012
BILLY- ha ha ha! where do you get this stuff? God bless the gifted comedians of the world...it might be they who end up saving us all! :)
Daniel Kahalas
1********g
April 8, 2012
It may come suddenly not expected..than what?
Daniel Kahalas
1********g
April 8, 2012
Would anyone survive even 5 miles down? Would it flip the earth to a geological pole shift?
John Holroyd
1********g
April 11, 2012
It depends upon the size of the impactor and the velocity of the little beasty. Large enough or fast enough and it could make the impact unsurvivable at any location on earth. Fortunately as the impact gets larger the chances of one happening goes down so the chances of an earth destroying impact are very small while the chances of a city size destruction event is pretty high. Tunguska would have taken out a major city and that happened only 104 years ago.