This article scares and saddens me. I played the game in high school and adored it. Ever since I read that soccer (English football) players who are known for

This article scares and saddens me. I played the game in high school and adored it. Ever since I read that soccer (English football) players who are known for 'heading' the ball have a substantially lower IQ than others, I've been uneasy about my football experience. Weren't my blows to head far harder than heading a soccer ball? Had I reduced my IQ permanently? This article, though... it suggests things are much worse than I thought. All my work and most of my pastimes, like reading Hacker News, rely on a powerful mind. I'm frightened.