Dancing water droplets in an air bubble inside a water bubble in space

Smarter Every Day 160: The WALKING WATER Mystery (in SPACE and SLOW MOTION!). (YouTube, 12min)

Destin Sandlin explains why you often see water droplets dance or bounce on the surface of water instead of coalescence occurs.

This video features astronaut Don Pettit, who did a cool experiment in space: He attached a big water bubble to a speaker, then inserted an air bubble into it. When he played cello music (by Yo-Yo Ma) through the speaker, little water droplets would detach from the water and bounce around inside the air bubble. You can see it in the above video starting right here.

Ernstzunehmen

Kinderdoc: Wenn der Kopf brummt.

“Kopfweh kommen in allen Altersklassen vor, vermutlich auch schon bei Säuglingen. Jedenfalls werden klassische Symptome wie Sehstörungen, Sprachproblemen und eben dem typischen frontalen oder haubenartigen Schmerz des Kopfes bei anderthalb- oder zweijährigen beschrieben oder auffällig.”

Interessant für selbst Betroffene oder Menschen, die mit Kindern und Jugendlichen arbeiten.

Anyone surprised any more?

Newsweek: Newsweek: Donald Trump’s Companies Destroyed Emails in Defiance of Court Orders.

“Over the course of decades, Donald Trump’s companies have systematically destroyed or hidden thousands of emails, digital records and paper documents demanded in official proceedings, often in defiance of court orders. These tactics—exposed by a Newsweek review of thousands of pages of court filings, judicial orders and affidavits from an array of court cases—have enraged judges, prosecutors, opposing lawyers and the many ordinary citizens entangled in litigation with Trump. In each instance, Trump and entities he controlled also erected numerous hurdles that made lawsuits drag on for years, forcing courtroom opponents to spend huge sums of money in legal fees as they struggled—sometimes in vain—to obtain records.”

Link via dangerousmeta.