Redken Science & Beauty II - 1975 book cover
I’m pretty sure that hair is a safety violation.
Two curves cut all circles at right angles: straight line and a tractrix.
I didn’t know what a tractrix was, so I Googled it! Tractrix definition from Wikipedia: Tractrix (from the Latin verb trahere ”pull, drag”; plural: tractrices) is the curve along which an object moves, under the influence of friction, when pulled on a horizontal plane by a line segment attached to a tractor (pulling) point that moves at a right angle to the initial line between the object and the puller at an infinitesimal speed.
Here’s a gif from Wikipedia showing a tractrix being created from dragging a pole:
What are friends for?
(Source: psychofactz.com, via psychofactz)
22 years ago today, the first photo was uploaded to the web – and it was of an all-girl science rock band from CERN, signing about colliders, quarks, and antimatter.
Oh, and they were actually really, really good.
Ray Bradbury on failure, why we hate work, and the importance of love in creative endeavors – a wonderful addition to our ongoing archive of sage advice on writing and life.