Science talk returns to brighten your day one more time. New discoveries, new takes on old knowledge, and other bits of news are all available for the perusing in today's information world. Over the fold are selections from the past week from a few of the many excellent science news sites around the world. Today's tidbits include Arctic climate more vulnerable than thought, top predatory are key to extinctions as the planet warms, biodegradable artery graft may enhance bypass surgeries, chemical evidence of the first dairying in Saharan Africa, a China submersible breaks the 7000-meter mark, and renewables could fill 80 percent of American electricity demand by 2050.
Pull up that comfy chair and grab a spot on the porch. There is always plenty of room for everyone. Another session of Dr. Possum's science education, entertainment, and potluck discussion is set to begin.