Wraith

― The Lobster (2015) “You can be a loner until the day you die. There is no time limit.”

March 12, 2008 – The Space Shuttle Endeavour during maneuvers prior to docking with the International Space Station. (NASA)

McLaren P1. by Charlie Davis Photography on Flickr.

MCLAREN F1 - 1 (by Eddy Clio)

Droplets of acetone deposited on a bath of warm water can float along on a Leidenfrost-like vapor layer. The droplets are self-propelling, too, thanks to interactions between the acetone and water. Acetone can dissolve in water, and when acetone vapor beneath the drop gets absorbed into the water bath, it lowers the local surface tension. That drop in surface tension creates a pull in the direction of a higher surface tension; this is what is known as the Marangoni effect. Because of that flow in the direction of higher surface tension, the acetone drop accelerates away. (Image credit: S. Janssens et al., source)