Links or 5/8/22

Media gets it wrong on Elon Musk and Twitter: The issue is oligarchy, not “free speech”

Introducing The Waxhead

Nano state: tiny and now everywhere, how big a problem are nanoparticles?

8 Endangered Places We Can Still Save From Climate Change

The little island that won: how a tiny Pacific community fought off a giant mining company

How do we stop the plunder of the Pacific? A panel of experts give their solutions

The 5 mass extinction events that shaped the history of Earth — and the 6th that’s happening now

Changing Angles Skateboard Analytics

Changing Angles is an interesting site concerned with analyzing various aspects of skating. Regarding the geometry of skateboard trucks the author is very thorough. What I didn’t find yet is where he discusses horizontal bushing compression, which appears to be part of the feel of a truck – hence “wrong” pivot axle/cup angles and large kingpin holes in the hangers as a design landmark for decades. Trying to force this design into a non-slop one will eventually destroy the pivot and cup, as he already documented himself (see figure about spherical bearings).