Some alternatives to foot work would be a double under (jumping high in a tuck jump position and turning your hands fast so the rope will go under twice before you land).
Yong Yu, a Chinese microbiologist, showed off the spacious building, with empty desks under an illustrated timeline detailing the rapid growth of Chinas Antarctic operations since the 1980s.
They were unaware that just before each object appeared, the screen quickly flashed either an angry, fearful or neutral face. These subliminal images tied an emotion to each object.
This similarity in density has long prompted speculation that the Moon split away from a rapidly rotating Earth, but this idea founders on two observations.