By WALT BOGDANICH and JO CRAVEN McGINTY
Christopher Capozziello for The New York Times
Richard Miller during a CT scan in Waterford, Conn.
Hundreds of hospitals across the country needlessly exposed patients to radiation by scanning their chests twice on the same day, records indicate.
Close Up, Mercury Is Looking Less Boring
By KENNETH CHANG
NASA’s Mercury Messenger spacecraft is painting a more vibrant picture of the solar system’s innermost planet.
Memory Implant Gives Rats Sharper Recollection
By BENEDICT CAREY
The test was a crucial first step in the development of so-called neuroprosthetic devices to repair deficits from dementia, stroke and other brain injuries in humans.
Japan Strains to Fix a Reactor Damaged Before Quake
By HIROKO TABUCHI
Engineers have been struggling to repair a reactor that has been in a precarious state of shutdown since a 3.3-ton device crashed into its inner vessel last August.
OBSERVATORY
A Frog Endangered, but Extinct No More
By SINDYA N. BHANOO
The Vegas Valley leopard frog, last seen in 1942 and declared extinct in 1996, has turned up in the form of the Chiricahua leopard frog, researchers reported.
OBSERVATORY
From Devastation in Japan, Vital Data
By SINDYA N. BHANOO
The earthquake and tsunami in Japan left researchers with an unprecedented amount of data, thanks to the country’s investment in earthquake-monitoring technology.
OBSERVATORY
Unusual Celestial Event Was Black Hole Swallowing a Star
By SINDYA N. BHANOO
Astronomers have identified the source of gamma rays coming from four billion light years away as a black hole that ripped a dying star apart.
Scientists See More Deadly Weather, but Dispute the Cause
By JOHN M. BRODER
The government released a report on the extreme weather so far in 2011 and observed that some of the patterns were similar to those of a century ago.
Bill Haast, a Man Charmed by Snakes, Dies at 100
Mapping Sun’s Potential to Power New York
F.D.A. Unveils New Rules About Sunscreen Claims
Truth Behind Watergate Uncertain, Even With Technology
Fireflies, Following Their Leader, Become a Tourist Beacon
Nuclear Plant Safety Rules Inadequate, Group Says
Science Times: June 14, 2011
Brendan Smialowski for The New York Times
The neuroscientist who leads the National Institute on Drug Abuse is facing a powerful enemy: prescription drug abuse.
Video: Interview With Nora Volkow
Serge Bloch
The opossum is the United States’ sole living example of a marsupial mammal — one that gestates its young in a pouch, rather than in a uterus.
BOOKS ON SCIENCE
From Hitler to Mother Teresa: 6 Degrees of Empathy
By KATHERINE BOUTON
Simon Baron-Cohen proposes that evil can be is more scientifically defined as an absence of empathy, made worse by negative parental and societal factors, with a genetic component.
In a ‘Perfect Storm,’ One Case of Equine Herpes Becomes Many
By KIRK JOHNSON
An unusual outbreak of equine herpes virus that apparently began at a cutting horse competition in Utah in May has sickened at least 88 animals in 10 states.
Scientists Measure the Accuracy of a Racism Claim
By NICHOLAS WADE
A study remeasuring the skull collection of the 19th-century biologist Samuel Morton appears to debunk a famous claim by Stephen Jay Gould about racism in science.
Health News
18 AND UNDER
A Graduation That May Carry Unnecessary Risk
By PERRI KLASS, M.D.
Studies show that the zone at the end of the pediatric period is fraught with uncertainties and risks, especially for children with chronic illnesses and disabilities.
A Defect That May Lead to a Masterpiece
By SANDRA BLAKESLEE
So-called stereo blindness — in which the eyes are out of alignment so the brain cannot fuse the images from each one — may actually be an asset when it comes to creating artwork.
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