 Yvonne Navarro co @-@ wrote a novelization based on the original screenplay with Dennis Feldman . The book gives several in @-@ depth details about the characters not seen in the film , such as Sil 's ability to visualize odors and determine harmful substances from edible items by the color . Gas appears black , food appears pink , and an unhealthy potential mate appears to give off green fumes . Other character details include Preston 's background in tracking down AWOL soldiers as well as the process of decoding the alien signal . Although no clues are given as to its origin , it is mentioned that the message was somehow routed through several black holes to mask its point of origin . 
 Yvonne Navarro <a href='uninflect' title='1'><mark>co</mark></a> @-@ wrote a novelization based on the original screenplay with Dennis Feldman . The book <a href='uninflect' title='2'><mark>gives</mark></a> several in @-@ depth details about the characters not seen in <a href='None' title='3'><mark>the</mark></a><a href='negative_concord' title='4'><mark>film</mark></a> , such as Sil <a href='null_genetive' title='5'><mark>'s</mark></a>ability to visualize odors and determine harmful substances from edible items by the color . Gas <a href='uninflect' title='6'><mark>appears</mark></a> black , food <a href='uninflect' title='7'><mark>appears</mark></a> pink , and an unhealthy potential mate <a href='uninflect' title='8'><mark>appears</mark></a> to give off green fumes . Other character details include Preston <a href='null_genetive' title='9'><mark>'s</mark></a>background in tracking down AWOL soldiers as well as the process of decoding the alien signal . Although no clues are given as to its origin , it is mentioned that the message was somehow routed through several black holes to mask its point of origin . 
Yvonne Navarro coed @-@ wrote a novelization based on the original screenplay with Dennis Feldman . The book give several in @-@ depth details abt the characters not seen in no film , such as Sil  ability to visualize odors and determine harmful substances from edible items by da color . Gas appear black , food appear pink , and an unhealthy potential mate appear to give off green fumes . Other character details include Preston  background in tracking down AWOL soldiers as well as tdaprocess of decoding the alien signal . Although no clues r given as to its origin , it is mentioned that the message was somehow routed through several black holes to mask its point of origin .