Articles from Science News (February 23, 1991)

Title	Author	Type	Words
'Go for it, kid': looking back on five decades of the Science Talent Search.	Cowen, Ron	Cover Story	3395
A radical mechanism for methane buildup.	Gibbons, Wendy		459
Cosmological paradox in the dark of night.			478
Gamma interferon slays microbial invaders.	Fackelmann, Kathy A.		620
Gene defect tied to Alzheimer's cases.	Weiss, Rick		398
Hundreds die in Afghanistan quake.			302
Insight proves key to marital therapy.			353
K-T wallop: through the looking glass.			301
Liquid crystal bridges silk-spinning gap.	Cowen, Ron		510
Nylon: sheer havoc.			162
Rebirth of a radiotelescope.			120
Snowflake growth puts on electrifying show.	Peterson, Ivars		632
The signal value of noise: adding the right kind can amplify a weak signal.	Peterson, Ivars		1013
Ultrasound 'eye' scans organs from within.	Gibbons, Wendy		435
When armored tanks walked on four legs.	Monastersky, Richard		455