3 ms·

I'm happy that ice floats.

• pfdietz 5y ago
  And that the carbon 12 nucleus has that excited state at just the right energy to make the triple-alpha process work.
• dclowd9901 5y ago
  Happier that water freezes at a pretty tolerable temperature and happens to be our main source of sustenance. Makes adding water ice to things a very refreshing experience!
• jasonladuke0311 5y ago
  I wrote an essay about this for my AP Chem test in high school. I still remember this question almost 25 years later!