(Eduard Kalinin )
Asteroids may be hitting Earth more often than thought
Also, studies on huge rock that hit Russia say it had the energy of 30-plus Hiroshima atomic bombs.
Medicare chief testifies about HealthCare.gov’s problems
Site will be working smoothly for most consumers by the end of the month, Marilyn Tavenner told the Senate.
Scientists say Earth-size, temperate planets common
The Milky Way galaxy alone could have about 25 billion rocky worlds in “habitable zones” of stars.
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More Health and Science news
Dozens dead in Philippines after typhoon
Experts say the speed of Typhoon Haiyan may have spared the island nation from a worse fate.
Few in D.C., Md. sign up on new health care exchanges
Some insurers worry that setbacks could make it difficult for customers to purchase their health plans.
Mental-health parity law is clarified
Insurers will be required to treat mental health and substance-abuse issues the same as physical illness.
Trans fats to be phased out, FDA says
The heart-clogging ingredient commonly used in processed foods such as frozen pizza remains a “significant public health concern,” the agency says.
Sebelius rejects calls to delay aspects of new health-care law
The HHS secretary assures Senate panel fixes are being made to HealthCare.gov.
Johnson & Johnson to pay $2.2B in fraud case
Company agrees to pay $2.2 billion to resolve probe into its marketing of Risperdal, other prescription drugs.
Soccer star tending to a new goal
World Cup champion Briana Scurry fights back from the concussion that ended her career, clouded her life.
Multimedia
Small worlds revealed
The winners of the 2013 Nikon Small World competition for microscope photography.
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Other news
Mediterranean diet may be tied to better health in later life
Study finds eating less meat and more fish, nuts, fruit and vegetables may make for a healthier old age.
A patient in a vegetative state shows awareness and focus
New study raises possibility of using devices someday to allow such people to communicate.
Filth taints 12 percent of imported food spices, FDA reports
Mexico had the highest percentage of exports of contaminated spices, followed by India.
Mathematical ability seems to be evident even in infancy
Also, a new book relies on common experiences to explain scientific principles.
Another reason why men don’t do yoga
The problem is a lack of classes specifically for aging men, who are less limber, one reader says.
Kaiser Health News
AnyBODY
Why I’m waiting to buy insurance on the health exchanges
It’s not (just) the Web site problems. It’s the price.
Why is it still so hard to diagnose ADHD?
School personnel play a big role in diagnosing the disorder, but they may not be best equipped for the job.
Can physical activity help kids do better in school?
Yes, studies say, they will test better. But whether being active helps them learn better is still unresolved.
How & Why/EcoLOGIC
The genetic mutants that led to a Nobel
How Randy Schekman transformed a simple idea into the basis for a hepatitis vaccine.
N.Y. chefs test whether chickens’ diet affects their taste
Experts say it may be easier to manipulate the flavor of eggs rather than that of flesh.
How bad for the Earth are gas-powered leaf blowers?
Pretty bad. But don’t get all high and mighty about your rake. Your lawn mower isn’t innocent, either.
Medical Mysteries
Emergency surgery followed many missed chances to diagnose illness
Until he nearly died, the reason for Kevin Songer’s weak muscles went undetected for more than 50 years.
Joint replacement had gone well, but patient’s shoulder still hurt
Woman endured years of surgery and pain before the mystery of her ailment was solved.
Health, Science & Environment Videos
Kliff Notes: Will Obamacare cancel my plan?
Wonkblog's Sarah Kliff explains why a lot of people's health insurance policies might get cancelled.
Kliff Notes: HealthCare.gov's 3 problems
Wonkblog's Sarah Kliff walks through the three main problems bogging down the Affordable Care Act's online marketplace.
Kliff Notes: Obama's healthcare speech
Wonkblog's Sarah Kliff shares her "Kliff Notes" for President Obama's remarks defending his signature healthcare law.
Obamacare Q&A: Are all marketplaces created equal?
Wonkblog's Sarah Kliff explains why the Affordable Care Act's health insurance marketplaces are different from state to state.
Obamacare Q&A: Who doesn't have to enroll?
Wonkblog's Sarah Kliff explains the exceptions to the Affordable Care Act's individual mandate.
Obamacare Q&A: What if I already have insurance?
Wonkblog's Sarah Kliff explains how insured people can use the Affordable Care Act's health insurance marketplaces.
Obamacare Q&A: Can anyone deny me coverage?
Wonkblog's Sarah Kliff explains what changes for people with pre-existing conditions under the Affordable Care Act.
Obamacare Q&A: Will I go to jail?
Wonkblog's Sarah Kliff explains what happens if you don't buy health insurance under the Affordable Care Act.
Obamacare explained, in 2 minutes
Wonkblog's Sarah Kliff breaks down the policy you need to understand about the Affordable Care Act, from politics to premiums.
Charity Sunshine Tilleman-Dick, a 29-year-old American soprano, has performed at the Kennedy Center, Lincoln Center, and around the world. A rare disease, idiopathic pulmonary hypertension, demanded she have two double-lung transplants. Despite all odds she continues to sing.
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