13 things that do not make sense

The name is good, but the article is much better: New Scientist 13 things that do not make sense is a New Scientist article about 13 areas in which observations do not line up with current theory. They are: the placebo effect, the horizon problem, Ultra-energetic cosmic rays, Belfast homoeopathy results, dark matter, Viking's methane, tetraneutrons, the pioneer anomaly, dark energy, the Kuiper cliff, the Wow signal, Not-so-constant constants and cold fusion. It's a very interesting article. Go read it. (via Slashdot)