Health & Science

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MELISSA BLOCK, HOST:

And now a vexing problem solved.

HENRIQUE OLIVEIRA: Tick-tock, tick-tock.

BLOCK: This is mathematician Henrique Oliveira. And for a while, he's tried to solve a problem that scientists have pondered for 350 years.

The crash of a Virgin Galactic spaceship last fall in California's Mojave Desert was caused by pilot error and design problems, the National Transportation and Safety Board announced Tuesday after a nine-month investigation.

Paola Kizette Cimenti / Flickr

Atkins, Weight Watchers, Paleo, low-carb, no-carb, juicing, cleansing… there are countless weight loss programs out there. So many in fact that choosing the right one can be a difficult and daunting task.

Presidential campaigns cost a lot of money these days — perhaps as much as $5 billion could be spent in the next election, by one estimate.

Some Twitter users pulled up their feed Tuesday and saw changes involving the reply, retweet and "fav" buttons.

Science journalist Anil Ananthaswamy thinks a lot about "self" — not necessarily himself, but the role the brain plays in our notions of self and existence.

Jamestown, Virginia — the first successful English colony in North America — was a difficult place, to say the least. Most of the colonists who arrived in 1607 died shortly thereafter.

Now archaeologists have discovered the remains of some of the colony's first leaders — Jamestown's elite.

Here's a bit of good news for Medicare, the popular government program that's turning 50 this week. Older Americans on Medicare are spending less time in the hospital; they're living longer; and the cost of a typical hospital stay has actually come down over the past 15 years, according to a study in the Journal of the American Medical Association.

Twitter has started taking down jokes for copyright infringement. The removals were first spotted by @PlagiarismBad, which traced the takedown notices to Olga Lexell, a freelance writer in Los Angeles.

Cancer patients who do rehabilitation before they begin treatment may recover more quickly from surgery, chemotherapy or radiation, some cancer specialists say. But insurance coverage for cancer prehabilitation, as it's called, can be spotty, especially if the aim is to prevent problems rather than treat existing ones.

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