2.
These ferrofluid Christmas trees.
4.
This lab safety announcement.
6.
Seriously, never gets old.
9.
This highly important experiment featuring liquid nitrogen and Ping-Pong balls.
10.
This wedding seating chart.
11.
This Facebook thread.
12.
This technically correct but not entirely useful sign.
14.
This liquid nitrogen-frozen carnation being hit with a hammer.
15.
This highly important lab setup.
16.
This magnificent bar trick.
19.
This extremely important experiment.
20.
This jellyfish being covered in green dye to track its movements.
21.
This xkcd/hand sanitiser combination.
23.
And this exam question too.
24.
This bit of brilliance.
25.
This floating piece of paper.
26.
This Facebook spoilsport.
27.
This orange LED being put into liquid nitrogen.
29.
And this lecture question.
30.
This overly contrived acronym.
31.
This textbook illustration.
33.
This bathroom graffiti.
34.
This physics exam question.
35.
This balloon of hydrogen being exploded by a toy car.
36.
This kitten in zero G.