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Recreational marijuana has been legalized in four states, but that doesn't mean it's a tested consumer product. Some of those potent buds are covered in fungus while others contain traces of butane, according to an analysis of marijuana in Colorado.

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Doctors are much more likely to level with patients who have cancer than patients who have Alzheimer's, according to a report released this week by the Alzheimer's Association.

The green sea turtle typically lives in tropical waters, like the shores of Mexico or Hawaii.

But recently, scientists have discovered a population swimming year-round in a river just south of Los Angeles. It's the northernmost group of these turtles known to science.

Visit the 3-mile stretch of the San Gabriel River in Long Beach, wait a few a minutes, and Cassandra Davis says you'll usually see their heads above the water.

When children are diagnosed with acute lymphoblastic leukemia now, they have more than a 90 percent chance of survival.

But when James Eversull was told he had leukemia in 1964, there wasn't much hope.

He was just 18 months old when his parents discovered what was wrong.

Johnny Reynolds knew that something was wrong as far back as 2003. That's when he first started experiencing extreme fatigue.

"It was like waking up every morning and just putting a person over my shoulders and walking around with them all day long," says Reynolds, 54, who lived in Ohio at the time.

In addition, Reynolds was constantly thirsty and drank so much water that he would urinate 20 or 30 times per day. "And overnight I would probably get up at least eight or nine times a night," he says.

Last year 4 million people visited SeaWorld's theme parks, where the top shows feature orcas, also known as killer whales. For years, activists have charged that keeping orcas in captivity is harmful to the animals and risky for the trainers who work with them, a case that gained urgency in 2010 when Dawn Brancheau, a veteran orca trainer, was dragged into the water and killed by a whale at the SeaWorld Park in Orlando, Fla. When Brancheau died, there was some dispute as to whether the whale's intent was aggressive and whose fault the incident was.

Even Neil DeGrasse Tyson Is Now Munching On Bugs

19 hours ago

More than 1,000 guests in gowns and tuxedos crowded into a two-story hall on Saturday night at the American Museum of Natural History in New York.

Standing among a pack of well-preserved African elephants, they sampled the delicacies offered by waiters wending their way through the throngs. They had come for the annual dinner of the Explorers Club — and the cocktail-hour fare certainly required an adventurous palate: All of it was made of insects.

When President Richard Nixon declared a war on cancer in 1971, there were high hopes that scientists were close enough to understanding the underlying causes that many cures were within reach.

We obviously haven't won the war.

In fact, a prominent cancer biologist argues that the conceptual framework for understanding cancer has come full circle over the past 40 years.

When someone asks whether we're winning the war on cancer, the discussion often veers into the world of numbers. And, depending on which numbers you're looking at, the answer can either be yes or no.

Let's start with the no.

The number of cancer deaths in this country is on the rise. It climbed 4 percent between 2000 and 2011, the latest year in official statistics. More than 577,000 people died of cancer in 2011. That's almost a quarter of all deaths. Those aren't just personal tragedies – the figure represents a growing burden on America.

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