Why we breathe
Hold your breath for a moment. In about 10 to 30 seconds you’ll be feeling a strong desire to take a breath. That’s not caused by lack of oxygen. It’s caused by excess carbon dioxide buildup in your blood. [Ok you can breathe again.] The trigger in mammals that causes us to want to take […]
November 11, 2009 | Startup Hacks, Startups | 1 comment