13 things that do not make sense

I think this has circulated a bit, but in case you missed it, it's a fascinating read: New Scientist's "13 things that do not make sense", a list of thus-far unexplained phenomena in science that you want to be goofs or hoaxes, but apparently you don't get your way. They include homeopathy, cold fusion (I didn't realize it was real), the placebo effect, dark matter, dark energy, bursts of energy from space, tetraneutrons, the 10th planet, methane on Mars, the rapid expansion of the universe.

You too should count the number of times Einstein gets second-guessed in this list.