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The half-life of a quantity whose value decreases with time
en.wikipedia.org
Gamespy Planet site for all the Half-Life games, Half-Life, Half-Life 2, HL2,
planethalflife.gamespy.com
Halflife2.net, the biggest dedicated Half-Life 2 and Valve
www.halflife2.net
Biological half-life, pertaining to organisms (also refers to "elimination
en.wikipedia.org
?Half-Life exists on a whole other, higher level of cinematic ambition than
www.halflifemovie.com
Half-Life?the debut title by Valve Software?took the
planethalflife.gamespy.com
Half lives of many radionuclides measured in the Radioactivity
physics.nist.gov
Half-Life for PC - GameSpot offers reviews, previews, cheats,
www.gamespot.com
The halflife is the amount of time it takes for half of the atoms in
www.colorado.edu
Valve, the Valve logo, Half-Life, the Half-Life logo, the
www.valvesoftware.com
