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EarthNorthern Refuge: White spruce survived last ice age in Alaska
Genetic analyses of white spruce trees at sites across North America suggest that some stands of that species endured the harsh climate of Alaska throughout the last ice age.
By Sid Perkins -
EarthWhat’s New in the Water? Survey tallies emerging disinfection by-products
By analyzing drinking-water samples from U.S. treatment plants, a multi-institute research team has identified some unexpected by-products of disinfection processes.
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Planetary ScienceTitan’s Lakes: Evidence of liquid on Saturn’s largest moon
New radar images strongly suggest that Saturn's giant moon Titan contains lakes of liquid hydrocarbons, marking the first time that researchers have found compelling evidence for bodies of liquid on the surface of any object beyond Earth.