The weekly roundup - June 10th

Hi there – just catching up with the weekly roundup after a bit of a break. The show did go on, so here are some of the stories covered. First, did you know that heart disease is the leading cause of death among American women? Now, researcher Nisha Parikh of UC San Francisco has found that the age a woman is when she reaches menopause affects her risk of developing heart disease. "We found that a longer reproductive period duration was actually associated with less of a risk of heart failure, and that was mostly driven by the age of menopause, so that having an earlier age at menopause was associated with a higher risk of heart failure." But researchers still don’t know what causes it and are working on further studies to find answers. Meanwhile, across the Bay at UC Berkeley, physicist Jeffrey Neaton is looking to Mother Nature to improve energy production skills. In particular, he’s working on making photosynthesis more efficient. "A leaf can convert the energy in sunlight into fuel with a one to two percent efficiency. A major Department of Energy program that I’m part of, the Joint Center for Artificial Photosynthesis, recently developed a prototype material that is made of semiconductors that can go from sunlight to fuel at 10 percent efficiency. Much greater efficiency than plants, actually." So, Neaton is working on creating an artificial leaf that could someday generate fuel and become a new alternative energy source. And finally, we learned something new about our lungs. They don’t just pump air in and out of our bodies – they make blood cells, too. "The lung is quite sophisticated, not just respiring, moving oxygen. Around 50 percent or more of platelets are produced directly in the lung." That’s Mark Looney, a professor of medicine at UCSF. He explains that since platelets are components that make our blood clot, and it used to be thought were formed only in the bone marrow, this new finding will have significant clinical implications. So, that’s it for now. But there’s plenty more research stories at the University of California, so please subscribe to Science Today on iTunes or follow us on Soundcloud to keep updated. Thanks for listening, I’m Larissa Branin.