Lightning and Reasoning
Watch closely. What do you observe? Find details, colors, patterns, shapes. Compare with other videos of lightning striking. Put things in context of science and …
Physics
Physics and Falling
I jump into things here — both literally and figuratively — because I made this for some people I tutor, and we had already partially …
Sleep
In “This expert has a dire warning about not getting enough sleep” (Market Watch, Nov 29, 2017, 10:42 a.m. ET), Emma Court writes:Sleep expert Matthew …
How Do Birds Get Vitamin D3?
In the book Beaks, Bones, and Bird Songs by Roger Lederer, Lederer says that, when pruning, birds put a chemical on their feathers that becomes …
Vitamin D and Epigenetics?
Fascinating. In “Vitamin D Metabolism, Mechanism of Action, and Clinical Applications,” Daniel D. Bikle writes:Vitamin D3 is made in the skin from 7-dehydrocholesterol under the …
The Amazing Vitamin D
Interesting. We learn more and more about Vitamin D as we conceptualize the things of and causes in reality. In “Sunlight and Vitamin D,” the …
Butterflies, Flight, and Physics
In “How Butterflies Fly,” J.N. Quinn writes:The wings of butterflies, and indeed, most insects, have a sharp edge. The sudden cut of of a butterfly’s …