“Safe sex” — in its most mechanical aspects — is the focus of this new study: “Mechanisms Predisposing Penile Fracture and Long-Term Outcomes on Erectile and Voiding Functions,” Leonardo O. Reis [pictured here], Marcelo Cartapatti, Rafael Marmiroli, Eduardo Jeronimo de Oliveira Júnior, Ricardo Destro Saade, and Adriano Fregonesi, Advances in Urology, volume 2014, article ID […]
Tag: top
Ten Tops List [videos of spinning tops] — 2011
There are lots of top ten lists, but this is the first Ten Tops List. Here are ten videos of spinning tops that scientists find interesting and or amusing. [Want to take a whirl at learning the science of spinning tops? Download (free) Professor John Perry’s 1890 book Spinning Tops— The “Operatives’ lecture” of the British […]
Geometrical regularity of the top of a man’s head
Wikipedia shows this pair of photographs of a man, taken in 1953. They are police mug shots: The man seems to have had a peculiar haircut, one that looks very different from the sides than from the front. From the front there is a strong, tripartite geometric regularity evident to the top third of his […]