The failure to replicate scientific findings by Kaiser Fung

The failure to replicate scientific findings by @junkchart (Kaiser Fung) - Scientific reproducibility has been much discussed of late. Quartz goes so far as to say "Nearly all of our medical research is wrong." Much of this lack of reproducibility comes from cherry-picking statistically significant results from a larger batch of experimental results, a practice that has become known as P-hacking. If you find yourself falling into this trap, make sure to apply corrections to avoid it.

I love Randall's description of the problem.