about catalytic converters

I was reading about palladium.

Me: “Palladium is a rare metal used mostly in catalytic converters.”

Vanessa: “What’s a catalytic converter for anyway?”

Me:  “I’m not exactly sure.”

Vanessa: “Great…so when I go to the mechanic and they say they need to replace the catalytic converter, I can say, ‘I don’t know what that is, but did you know that catalytic converters use a rare metal called palladium?'”

Interesting hermit crab fact

Hermit crabs can trade shells in a chain?

“Several hermit crab species, both terrestrial and marine, have been observed forming a vacancy chain to exchange shells. When an individual crab finds a new empty shell it will leave its own shell and inspect the vacant shell for size. If the shell is found to be too large, the crab goes back to its own shell and then waits by the vacant shell for anything up to 8 hours. As new crabs arrive they also inspect the shell and, if it is too big, wait with the others, forming a group of up to 20 individuals, holding onto each other in a line from the largest to the smallest crab. As soon as a crab arrives that is the right size for the vacant shell and claims it, leaving its old shell vacant, then all the crabs in the queue swiftly exchange shells in sequence, each one moving up to the next size.”

accidental solar heating

A few years ago, we added an external glass door to our south-facing front door.  Don’t do this.  The glass helps trap heat and turns the whole thing into an oven.  It gets hot enough to burn you and has damaged the paint on the front door.  As the energy.gov site says, “Never add a glass storm door if the exterior door gets more than a few hours of direct sun each day. The glass will trap heat against the entry door and could damage it.”  Would have been nice to read that a few years ago.