This is SCIENCE FRIDAY. I'm Ira Flatow. If you're out shooting hoops this summer or you're going for a jog, you know it won't be long before you're sopping wet and, you know, it's really sweaty out there. And where's all that sweat coming from? Your body's water supply, of course. You have to replenish those fluids if you sweat a lot. But it's not as simple as the old eight-glasses-a-day mantra. How much should you really drink? Too much water, you can die, as has happened to marathon runners who chugged too much water during the race.
Reporting in Science, two teams of scientists say they were unable to replicate the results of a 2010 study claiming to have found 'alien life' on Earth--a bacterium that could build its DNA using arsenic. Science journalist Carl Zimmer talks about how the controversy played out online, and how science corrects itself.
Reporting in the Bulletin of the American Meteorological Society, researchers write that extreme heat waves, such as the one last year in Texas, are 20 times more likely today than they were in the 1960s. NOAA climatologist Tom Peterson discusses what future climate change may bring.
California lawmakers gave the green light to the first phase of construction of high-speed rail in the state. Does this mean that America is on track for faster, sleeker trains? What potential speed bumps still lie ahead? Railroad engineer Christopher Barkan discusses the costs, benefits and state of the technology.
What makes some types of cancer resistant to drugs? Reporting in Nature, researchers write that cancer cells may be dodging treatment with help from seemingly innocent bystanders. Cancer researcher Todd Golub discusses how a tumor's microenvironment may affect its behavior.
Researchers have found a fridge-free way to store vaccines and antibiotics. Biomedical engineer David Kaplan, senior author of the study in the Proceedings of the National Academy of Sciences, discusses how heat-sensitive drugs wrapped in silk stay effective for months at high temperatures.