The Tungurahua volcano, Ecuador. Photographed by Patrick Taschler. 

Via Astronomy Picture of the Day.

Via Cognitive Daily, here’s the famous Dragon Illusion, one of the more potent variations of the Hollow Face Illusion. 

Make your own. Thrill your friends. Impress women. More.

Here’s footage of British troops unwittingly testing LSD, circa 1953/54. The experiments were supposedly to determine the drug’s value as a “non-lethal incapacitating weapon.” Hilarity ensues. One soldier attempts to feed the birds by climbing a tree. “The efficiency of the rocket launcher team was also very impaired.”

Online Videos by Veoh.com

Related. And.

A form of ‘content-aware’ image manipulation has been developed by Shai Avidan and Ariel Shamir of Israel’s Efi Arazi School of Computer Science. Their prototype software allows images to be dramatically resized without scaling or cropping. By assigning levels of importance to component parts of an image, the software is able to shrink or stretch images while leaving key features intact and in proportion, and all in real time.

More. And. Related. Also. (H/T, Protein Wisdom and The Thin Man.) 

If yesterday’s ephemera entry on ways to visualise data was of interest, there’s more on the subject here, here and here. The data being visualised covers everything from earthquake activity and email flow to human trafficking. 

The Fidg’t visualiser is particularly lovely. More. And. Related, this, this and this. (H/T, 1+1=3.)