500 :
, :
, .
L-.
- .
, . . , 500 , :
1. :
20 . :
-
20 = 1/20
-
500 = 1/20500 = 1/10650
= 10650
L-
-
L- =1/2
-
500 L- =1/2500 = 1/10150
= 10150
. , . , , 50%. :
- 2-
= 1/2
- 500
=1/2499 = 1/10150
= 10150
: = 1. X 2. X 3.
= 1/10650 1/10150 1/10150 = 1/10950
= 1 10950
-92-
, , .
Earth 1998 Lifes Crucible ( ):
. , . , , 1953 . , , - , ? , , : . ? . 1
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, , . , , . 1998 National Geographic , :
, , , , , , , . ! . , ... , ? 2
, , . , , , .