ALLERGY, RESPIRATORY
Folic Acid Might Offer Allergy Relief
'Safe' Ozone Levels May Not Be for Some
Combating Myths About Seasonal Allergies
ALTERNATIVE MEDICINE
Acupuncture, Real or Fake, Eases Back Pain
Licorice May Block Absorption of Organ Transplant Drug
Ginger Can Ease Nausea From Chemotherapy Treatments
ANIMAL CARE
Separation Anxiety, Canine-Style
Animals Respond to Acupuncture's Healing Touch
Safe Toys for Dogs
BONES & JOINTS
More Faces Being Spared in Motor Vehicle Accidents
Soccer's a Winner for Building Bone Health in Girls
Fractures in Older Adults Up Death Risk
CANCER
Study Cites Gains in Gall Bladder Cancer Treatment
Where You Live May Affect Your Cancer Diagnosis
Spice Compounds May Stem Tumor Growth
CAREGIVING
Babies Born in High Pollen Months at Wheezing Risk
Caregivers Face Multiple Strains Tending Older Parents
With Age Comes Greater Risk of Hypothermia
CIRCULATORY SYSTEM
Obesity Linked to Heart Failure Risk
Review Confirms Links Between Diet, Heart Health
Varicose Veins May Mask Larger Problem
COSMETIC
The Acne Drug Accutane More Than Doubles Depression Risk
Get Sugared!.... Its a sweet choice for hair removal
Study Evaluates Laser Therapies for Hair Removal
DENTAL, ORAL
Holistic Dentistry-My View
Sports Drinks May Be Tough on Teeth
Acid Drinks Blamed for Increase in Tooth Erosion
DIABETES
Whole Grains Take a Bite Out of Type 2 Diabetes Risk
Fish Twice a Week Cuts Diabetics' Kidney Risks
Arthritis Hits More Than Half of Diabetics
DIET, NUTRITION
Is Coffee Good or Bad for Your Health?
Is Your Refrigerator Getting Enough Attention For Your Raw Food Success?
Common Antioxidant Might Slow Parkinson's
DISABILITIES
Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
ENVIRONMENTAL HEALTH
Most Mt. Everest Deaths Occur Near Summit During Descent
Controversial Chemical Lingers Longer in the Body
Agent Orange Exposure Tied to Prostate Cancer Return
EYE CARE, VISION
Unconscious Learning: In the Eye of the Beholder?
Too Much Sun, Too Few Antioxidants Spell Eye Trouble
Green Tea May Ward Off Eye Disease
FITNESS
You Can Get Great Exercise In The Garden
Occupational Therapy Plus Exercise Benefits Osteoarthritis
Study Shows Exercise Shields Against Osteoporosis
GASTROINTESTINAL PROBLEMS
Bowel Prep Harder on Women Than Men
Olive Oil May Protect Against Bowel Disease
HRT Use Raises Risk of Stomach Trouble
GENERAL HEALTH
Have a Goal in Life? You Might Live Longer
More Calcium And Dairy Products in Childhood Could Mean Longer Life
Why Am I So Tired? Could It Be Low Thyroid?
HEAD & NECK
Ski Helmets Encouraged for All
Zen May Thicken Brain, Thwart Pain
Many Children Will Outgrow Headaches
HEALTH & TECHNOLOGY
Imaging Sheds Light on How Acupuncture Works
'Cell Phone Elbow' -- A New Ill for the Wired Age
Magnet Therapy May Ease Hard-to-Treat Depression
HEARING
Summer Sounds Can Lead to Hearing Loss
Noise Hurts Men's Hearing More, Study Shows
HEART & CARDIOVASCULAR
Walk Long, Slow and Often to Help the Heart
Rheumatoid Arthritis a Threat to the Heart
Whole Grains Lower Risk of Heart Failure
INFECTIOUS DISEASE
Dry Weather Boosts Odds of Flu Outbreaks
More Medicinal Uses for Pomegranate
Poor Restroom Cleaning Causes Cruise-Ship Sickness
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Teens Lose More Weight Using Healthy Strategies
Dangerous Toys Still on Store Shelves, Report Finds
Gene Variation Found in Boys With Delinquent Peers
MEN'S HEALTH
Low Iron Levels Cut Cancer Risk in Men With PAD
Lots of Sex May Prevent Erectile Dysfunction
Whole Grains, Bran May Fight Hypertension in Men
MENTAL HEALTH
Vitamin C Protects Some Elderly Men From Bone Loss
The Unmedicated Mind
Massage Fosters Healing in Bereaved Relatives
PAIN
Alleviating Rheumatoid Arthritis
Tai Chi May Help Ease Fibromyalgia
'Cell Phone Elbow' -- A New Ill for the Wired Age
PHYSICAL THERAPY
PREGNANCY
Yoga's Benefits Outweigh Risks for Pregnant Women
Sugary Colas Tied to Gestational Diabetes
Alternative Treatments May Boost IVF Success
SENIORS
Any Old Cane Won't Do
Tai Chi and Qigong Offer Many Health Benefits: Review
Money May Matter, Health-Wise, in Old Age
SEXUAL HEALTH
SLEEP DISORDERS
Moderate Aerobics May Ease Insomnia Symptoms
Meditation May Help Put Primary Insomnia to Bed
Exercising Throat Muscles May Relieve Sleep Apnea
WOMEN'S HEALTH
Sugary Colas Tied to Gestational Diabetes
Frankincense Provides Relief for Osteoarthritis
Women Who Run May Benefit From Extra Folic Acid
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Meat-Eating Dinosaurs Used Legs and Arms Like Birds

WEDNESDAY, March 4 (HealthDay News) -- Meat-eating dinosaurs that walked on their hind legs (theropods) and held their arms with their palms faced inward -- just like birds -- were roaming the Earth at least 198 million years ago.

It's long been known that theropods, such as Tyrannosaurus rex and Velociraptor, held their arms this way. But a lack of clear fossil evidence has made it difficult to determine when this bird-like posture evolved.

A report published online this week in the journal PLoS One details fossilized handprints and footprints made by a large, meat-eating dinosaur about 198 million years ago. The tracks in rocks in St. George, Utah, were made by a theropod that sat down and extended its arms far enough that they left marks in the ground.

"The crouching tracks are preserved on the shore of an ancient lake," the paper's lead author, Andrew Milner, a paleontologist at the St. George Dinosaur Discovery Site at Johnson Farm museum, said in a journal news release. "The theropod that made the tracks may have been in the lake but walked out and up a shallow slope and sat down for some reason."

"These tracks are important because the handprints have inward-pointing fingers, showing that even very early theropods had bird-like arms and hands with inward-facing palms," Milner said.

Co-author Jerry Harris, of Dixie State College in St. George, said in the news release that "while theropod arms couldn't pivot to make the palms face up or down the way a human's hands can, they certainly could move."

"In particular, the wrist could pivot up and down, allowing the outside of the hand to move toward the side of the arm, a motion impossible for humans," Harris said. "But this is the same motion birds have that allows them to fold their wings."

"These tracks show that this ability evolved long before feathery wings did, and much earlier than this posture is known from theropod skeletons," he said. "Birds only inherited this ability from their ancestors."

The theropod tracks were found in a large area that also included the fossilized tracks of more than 1,000 large and small dinosaurs and small, early relatives of alligators and crocodiles.

More information

The University of California Museum of Paleontology has more about theropods.



-- Robert Preidt



SOURCE: PLoS One, news release, March 3, 2009

Last Updated: March 04, 2009

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