Articles from Science News (May 18, 1991)

Title	Author	Type	Words
AIDS dementia: neurons nixed by virus?	Walker, Tim		598
Clarifying dioxin's cellular invasion.	Ezzell, Carol		826
Clues to a perilous pregnancy.	Fackelmann, Kathy A.		228
Earlobe crease hints at heart disease.			259
Enigmas overturned by Chinese fossils.	Monastersky, Richard		669
Mastodon remains yield oldest life.			294
Menopausal hormone therapy: a new risk?	Fackelmann, Kathy A.		313
New lead rules for water.			310
Pass the plasma, ... please: some engineers and scientists are working out new collaborative strategies to speed technological progress.	Pennisi, Elizabeth		2795
Rice: methane risk rises.			303
Starlight spotlights galaxy's slow start.	Cowen, Ron		663
The sacred turnip: dietary clues gleaned from tuber traditions.	Cowen, Ron	Cover Story	1689
Two new wrinkles for cigarette smokers.	Fackelmann, Kathy A.		679
Weaving a tapestry of spiral chemical waves.	Peterson, Ivars		356