National Healthscience

Nearly 1 in 20 US adults over 50 have fake knees

Nearly 1 in 20 Americans older than 50 have artificial knees, or more than 4 million people, according to the first national estimate showing how common these replacement joints have become in an aging population.

http://1.usa.gov/xeWHqG

http://www.aaos.org

For pregnant women with cancer, chemo possible

Researchers have encouraging news for women who find themselves in a very frightening situation: having cancer while pregnant. Studies suggest that these women can be treated almost the same as other cancer patients are, with minimal risk to the fetus.

http://www.cancerinpregnancy.org

http://www.lancet.com

For pregnant women with cancer, chemo possible

Researchers have encouraging news for women who find themselves in a very frightening situation: having cancer while pregnant. Studies suggest that these women can be treated almost the same as other cancer patients are, with minimal risk to the fetus.

http://www.lancet.com

http://www.cancerinpregnancy.org

Hold the mystery meat: Military food gets upgrade

Hold the mystery meat: Military mess halls soon will be serving more fruits, vegetables and low-fat dishes under the first program in 20 years to improve nutrition standards across the armed services.

Scientists say NASA cutting missions to Mars

Scientists say NASA is about to propose major cuts in its exploration of other planets, especially Mars. And NASA's former science chief is calling it irrational.

www.nasa.gov

Lawyer: 6 Austrians were injected with malaria

The number of people claiming they were injected with the parasite causing malaria at a Vienna psychiatric ward while teenagers grew to seven Thursday, with the lawyer representing six of them saying their accounts, given separately, are credible because they are similar.

La Nina going away, but too late for Texas drought

Federal weather forecasters say the La Nina weather phenomenon that contributed to the southwestern U.S. drought is winding down.

Doctors telling more adults: Get out and exercise

More and more U.S. adults are being told by their doctor to get out and exercise, according to government survey released Thursday.

http://www.cdc.gov/nchs/

India's global pharmacy role threatened by EU pact

Efforts by India and the European Union to strengthen trade are threatening India's ability to deliver lifesaving medicines to the world's poorest, analysts say as the two sides push through protracted negotiations on a free-trade pact.

http://twitter.com/katydaigle

Life in Antarctic lake? It's everywhere else

If scientists find microbes in a frigid lake two miles beneath the thick ice of Antarctica, it will illustrate once again that somehow life finds a way to survive in the strangest and harshest places.

http://astrobiology.nasa.gov

Study: Tai chi helps ease symptoms of Parkinson's

The ancient Chinese exercise of tai chi improved balance and lowered the risk of falls in a study of people with Parkinson's disease.

http://www.nejm.org

http://nccam.nih.gov/health/taichi/

Study: Electric boost helps brain to learn better

People learned better when a key part of their brains got mild zaps of electricity, a finding that may someday help Alzheimer's patients keep more of their memories.

http://www.nejm.org

http://www.twitter.com/malcolmritter

Study finds MDs not always honest with patients

Trust your doctor? A survey finds that some doctors aren't always completely honest with their patients.

Mexican experts excited to find ancient home ruins

The ruins aren't particularly impressive, just some stone and clay footings for houses that probably supported walls of wood or clay wattle. And it's that very ordinariness that has experts excited.

Unplanned 9/11 analysis links noise, whale stress

An ocean experiment that was accidentally conducted amid the shipping silence after Sept. 11 has shown the first link between underwater noise and stress in whales, researchers reported Wednesday.

Unplanned 9/11 analysis links noise, whale stress

Researchers say an ocean experiment that was accidentally conducted amid the shipping silence after Sept. 11 has shown the first link between underwater noise and stress in whales.

In scientific coup, Russians reach Antarctic lake

Opening a scientific frontier miles under the Antarctic ice, Russian experts drilled down and finally reached the surface of a gigantic freshwater lake, an achievement the mission chief likened to placing a man on the moon.

Shuttle astronaut Janice Voss dies of cancer at 55

NASA astronaut Janice Voss, who first worked for the space agency as a teenager and flew five shuttle missions in seven years, has died. She was 55.

Man who warned of Challenger disaster dies at 73

Roger Boisjoly, a NASA contractor who repeatedly voiced concerns about the space shuttle Challenger before it exploded, has died. He was 73.

Man who warned of Challenger disaster dies at 73

The man who warned his employer of the equipment quirk that led to the deadly explosion of the space shuttle Challenger has died. Roger Boisjoly was 73.

CDC: Fewer smokers go to the dentist

Smokers not only have more problems with their teeth than non-smokers, they also go to the dentist less often.