… courtesy of xkcd.

Alien life? Wake me up.
On students’ dreams and work ethics.
HA! Coupon code.
On teaching, when a good question is asked.
Young love.
I disagree.
I’m not smart enough to get this.
Silly putty? No, try serious.
X and Y axes need labels, people.
And, last but not least, this one made me laugh the most. No way dude… it’s this one. HILarious.