PHILADELPHIA -- When the Allies needed a weapon terrible enough to end World War II, scientists devised the atomic bomb. When the Soviet Union hurled Sputnik into space, American scientists rallied to build the world's top space program
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Feed SubscriptionHow Ultrasound Changed the Human Sex Ratio
Editor's Note: The following is an excerpt from Mara Hvistendahl's book , Unnatural Selection: Choosing Boys over Girls and the Consequences of a World Full of Men. The technology that ultimately became the dominant method of sex selection around the world began as a tool for navigation. The story of ultrasound dates to 1794, when an Italian biologist curious about how bats find their way in the dark discovered sonar, or the fact that distance can be determined by bouncing sound waves off a faraway object and measuring how long it takes for the waves to ricochet back
Read More »Abortion foes see chance for tougher curbs
Buoyed by huge election gains for their allies, anti-abortion activists head into their annual March for Life rallies sensing a prime opportunity in many states to rein in the broad abortion access established 38 years ago by the Roe v Wade decision.
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