I always thought it was odd no one made an external heatsink for laptops. Apparently at one point (1983) someone thought it was possible: http://papers.sae.org

I always thought it was odd no one made an external heatsink for laptops. Apparently at one point (1983) someone thought it was possible: http://papers.sae.org/831101/ http://papers.sae.org/831101/