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The Tick-Tock of the Biological Clock

Biological clocks count off 24-hour intervals in most forms of life. Genetics has revealed that related molecular timepieces are at work in fruit flies, mice and humans

March 1, 2000 — Michael W. Young

The Neutrino Puzzle

The largest experiment ever to probe these mysterious particles could point the way to new physics

October 1, 2017 — Clara Moskowitz

Lessons from before Abortion Was Legal

Before 1973, abortion in the U.S. was severely restricted. More than 40 years later Roe v. Wade is under attack, and access increasingly depends on a woman's income or zip code

September 1, 2017 — Rachel Benson Gold and Megan K. Donovan
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