Yashwanth Varma

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How E. coli turn into blobs and back again

Sixty years ago, Nobel Prize-winning scientist Joshua Lederberg first described a biological mystery. He showed how bacteria could lose the cell …

Biology

FDA Approves First Biosimilar Cancer Drug

It's a bold move toward more affordable medicine<p>The Federal Drug Administration approved the first biosimilar product in the United States on Friday. The drug, Zarxio, is now permitted for use in chemotherapy treatments to help patients' bodies produce white blood cells. Zarxio is the generic …

Vegetarians who ate fish had lowest colorectal cancer risk, study says

Colorectal cancers kill more Americans than any other cancer except lung cancer, but a new study suggests you can reduce your risk of the disease by laying off the cheeseburgers and pastramis and opting for a large salad or broiled salmon instead.<p>After tracking 77,659 Americans and Canadians for an …

Antibiotic resistance: sometimes knowledge is not enough

If antibiotic resistance continues to spread, then the drugs we take for granted now will become ineffective within the next few decades. The UK’s Chief Medical Officer, Dame Sally Davies, wasn’t exaggerating when she said it could herald the end of modern medicine, because without antibiotics, …

How A Tilt Toward Safety Stopped A Scientist's Virus Research

As cases of a worrisome respiratory virus continue to pop up in the Middle East, scientists who study it in the U.S. are struggling to understand how they'll be affected by a government moratorium on certain kinds of experiments.<p>One of those researchers is Ralph Baric, a virologist at the …

Allergic to Penicillin? You're Probably Not

Most people who think they are allergic to penicillin in fact are not, researchers said Friday. It’s something doctors have suspected for a long time, but the researchers say they were surprised by just how many people weren’t allergic to the antibiotic: it was 94 percent of them.<p>Dr. Thanai …

Why We 'Choke' Under Pressure, According To Neuroscience

During the 2012 Summer Olympics in London, all eyes were on the U.S. Women's Gymnastics team, who won the team gold in gymnastics for America for the first time since 1996. But during the individual vault event, all eyes were on one U.S. gymnast in particular: McKayla Maroney. The 16-year-old …

How the flu gets cells to crack open its shell

The flu virus has a clever way to trick cells into cracking open its shell and releasing its genetic code.<p>Until now, very little has been known about …

Flu

Toxin-Secreting Stem Cells May Destroy Brain Tumors From Inside Out

Poisoning cancer from within<p>In the realm of cancerous diseases, tumors affecting the brain can be particularly difficult to cure. Many are fast moving and take hold of key sections of the body’s most fundamental organ, rendering surgical removal extremely difficult or impossible.<p>Now, researchers at …

Doctors transplanted 'dead hearts' into three patients, and it worked

A medical first<p>Two months ago, doctors in Australia transplanted a "dead heart" — a heart that had stopped beating inside a donor's chest — into a 57-year-old woman, reports the <i>BBC</i>. The operation, which has been deemed success, was unlike any other, because for the first time, it didn't involve a …

‘Dead’ hearts transplanted into living patients in world first

Australian surgeons have successfully transplanted “dead” hearts into patients for the first time – a groundbreaking procedure with the potential to significantly boost the supply of donor organs.<p>The number of donor hearts has been limited in the past by the fact that they have had to be taken from …

Curiosity: It Helps Us Learn, But Why?

How does a sunset work? We love to look at one, but Jolanda Blackwell wanted her eighth-graders to really think about it, to wonder and question.<p>So Blackwell, who teaches science at Oliver Wendell Holmes Junior High in Davis, Calif., had her students watch a video of a sunset on YouTube as part of …