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October 22, 2021 Archives

Friday, October 22, 2021

TRACKING WITH CLOSEUPS: Piranha Solution

A mixture of around 3/4 concentrated sulfuric acid and 1/4 hydrogen peroxide (don't add too much peroxide or it may explode, which would be bad) is called “piranha solution”. It does the most remarkable things to organic material. It is used in semiconductor manufacturing to remove photoresist from silicon wafers.

Posted at 13:07 Permalink

CONTINUITY: Lunar Worm

Before the Surveyor spacecraft landed on the Moon, nothing was known about the properties of its surface. Some very odd ideas were explored about how one might move around there.

Posted at 12:08 Permalink

CONTEXT: How Virtual Worlds Work—Part 4, Objects and Behaviours

Posted at 11:38 Permalink

TRACKING WITH CLOSEUPS: Embryonic Development of the Alpine Newt

Posted at 11:08 Permalink