My most recent newsletter was about boiling eggs.
A reader rightfully pointed out that putting cold eggs in boiling is leading cause of cracked shells since the middle ages. The temperature difference creates pressure that the shell can't handle . . . and boom!
There are two solutions to this.
1. Using a pin, poke a tiny whole at the base of he shell, essentially creating a "pressure release valve".
2. The reader gave me a trick I had never heard of, but make compete sense. You simply warm you eggs under hot running water so that the temperature difference isn't so great when they hit the water.