Science teacher

" But, you can actually use chemical energy stored in a lemon and two metals to make a current and light up a small LED. It’s true and...

When I die, I hope nobody mistakes my kindness for niceness. I am not a nice man. Dr. King's life profoundly affected mine. I hav...

5:23 P.M. here--the sun stands still, shifts its mass * , and heads back north. 6 months ago, when we sat on the opposite side of the sun...

Another comet hangs in the sky. Here's a story from years ago. Philipp Salzgeber, CC She was a kid. She was dying. Everyone kne...

I took a walk barefoot along the edge of the bay today. It's December, so I am re-posting this. A rose hip in December. The dar...

It's a mid-30's chilly, a bright Venus, dawn sliding up over the east, Sirius fading over the bay just west of us. Most of the ...

"It follows from the new definition of the SI described above that, effective from 20 May 2019...the definition of the kilogram in fo...