4 ms·

You'd think, but in fact biochemistry is quite bad at disposing of pure carbon compounds. You can test this: stick a pencil lead into some compost for a week a

You'd think, but in fact biochemistry is quite bad at disposing of pure carbon compounds. You can test this: stick a pencil lead into some compost for a week and pull it out.

sp332 4y ago
I still have a piece of pencil lead stuck in my finger from 24 years ago, though it has gotten smaller. And I know someone with a piece more than twice that old.
- scotty79 4y ago
  Doesn't it contain a lot of clay?