China science, technology news summary -- Oct. 27
BEIJING, Oct. 27 (Xinhua) -- The following is a summary of published science and technology news of China. ANTARCTIC EXPEDITION China research icebreaker Xuelon
Source: shanghaisun.com
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How hummingbirds hum
E-Mail IMAGE: Anna's hummingbird flying in the experimental setup, drinking sugar water from a fake flower. view more Credit: Photo: Lentink Lab / Stanford University. The hummingbird is named after its pleasant humming sound when it hovers in front of flowers to feed. But only now has it become clear how the wing generates the hummingbird's namesake sound when it is beating rapidly at 40 beats per second. Researchers from Eindhoven University of Technology, Sorama, a TU/e spin-off company, and Stanford University meticulously observed hummingbirds using 12 high-speed cameras, 6 p...
Source: eurekalert.org