what is this?

from time to time I see this poster while I'm at work called "today I learned ..." it's full of little knowledge bombs from people and it just gives their age as the author. some are as simple as "I've learned that hiding your broccoli at the bottom of your milk doesn't work -age 7 " to "without problems their would be no opportunities " . Several times I learn things in the course of the day and I just thought I would share them in this medium so that I and anyone else interested can reflect on them L8r.