a1 Petrified tree rings tell ancient tale of sun’s behavior The sun has been in the same routine for at least 290 m…
a1 50 years ago, methadone made a rosy debut Heroin cure works [T]he drug methadone appears to have …
a1 E-cigarette smoking linked to heart disease risk Electronic cigarettes may increase the risk of heart di…
a1 Cow carved in stone paints picture of Europe’s early human culture This stone engraving of an aurochs, or wild cow, found …
a1 Number of species depends how you count them Genetic methods for counting new species may be a littl…
a1 Supernova spotted shortly after explosion Astronomers have caught a star exploding just hours aft…
a1 Enzymes aid rice plants’ arsenic defenses BOSTON — Rooted in place, plants can’t run away from ar…
a1 Howler monkeys may owe their color vision to leaf hue BOSTON — A taste for reddish young leaves might have pu…
