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Physics

Supercool, and Strange

Scientists tracking H2O's highs and lows are finding new clues as to how and why the familiar substance is so odd. Recent research, for example, suggests that water may exist in two distinct liquid phases at ultralow temperatures.

Humans

Letters from the January 26, 2008, issue of Science News

Bad medicine? In “Unseen Risk: Lifestyle, physical problems may underlie psoriasis link to early mortality” (SN: 12/22&29/07, p. 389), the definition of patients with severe psoriasis as those needing systemic drugs raises the question whether treatment itself may be linked to early mortality. The journal article cited in the story indicates that some systemic treatments […]

Math

Checking It Twice

Election officials have had no practical way to guarantee a correct ballot count—until now.