A U.S. team found nearly 4,000 species in a subglacial lake that hasn't seen sunlight in millennia, showing life can thrive even under the ice.
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National Science Foundation http://www.nsf.gov/news/news_summ.jsp?cntn_id=132267
Scientific American http://www.scientificamerican.com/article/life-found-800-meters-down-in-antarctic-subglacial-lake/
PLOS One http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0067221
Image via: National Science Foundation / Brent C. Christner
The class of drugs that Levitra, Viagra, Stendra, and Cialis belong to are called PDE5 inhibitors. They work by relaxing tight blood vessels, allowing more blood to surge into the penis and cause an erection, says Gregory Bales, M.D., an associate professor of urology at the University of Chicago.
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