Every once in a while you need to curl your neurons.
Gravitational Waves Should Permanently Distort Space-Time
Mathematicians Transcend Geometric Theory of Motion
These should help, as will, the rest of the site.
The weather here, this week, was doing its best to twist a few, too. 17 C (62 F) Tues with 0.5 inches of rain, -17 C (-1.4F) Fri with 5 inches of Thurs snow, 14 C (57 F) Sun with 0.5 inches of rain.