WORTH A CLOSER LOOK + TANSTAAFL! + ROCKS FROM SPACE
Worth a Closer Look
The frost you usually see on cars isn't as visibly cool
as the
frost I got a picture of on my car back in 2006, but
in fact, it always looks like that on a microscopic scale.
The freezing of water is an amazing phenomenon.
This is a video clip from an old National Geographic
special from the 1970s. It shows the process of freezing on a
microscopic scale. So cool.
Sometimes the conditions are just right so that
the crystallization can spread far enough to be
visible, as it did on the trunk of my car back in 2006.
TANSTAAFL!
What does TANSTAAFL stand for? It's explained in
this video about where your
electrical power comes from.
Rocks from Space
In this video: why we worry about rocks from space.
The stats on the meteor that I gave in the video were outdated.
More current estimates are that
it was about the size of two classrooms;
it was equivalent to 20 to 30 atomic bombs;
and it exploded about 18 miles up. It is true, though, that
if it hadn't come in at an angle - if it had come straight down - there would be no Chelyabinsk.
A group of former astronauts who are trying to raise money to launch a satellite to look out for
rocks more effectively, since Congress isn't dedicating the funding
needed: The B612 Foundation
