Perelman explained the reason for the refusal of $ 1 000 000

Perelman called the cause of failure injustice in the mathematical community.
The scientist says that not only did he contribute to the proof of the Poincaré conjecture.
He said that before him they had already done it - in particular, in the early 1980s, American Richard Hamilton.
The scientist considers further discussion of the topic a painful topic.

Here he is such a person.
Interestingly, he uses the Internet, does he visit Habr?