Structure of Haemoglobin: Haemoglobin is an aggregation of four globular proteins (typically two alpha and two beta subunits), each with an embedded haeme group. Each haeme group allows the binding of an oxygen molecule.
Here's another intriguing case from the Guinness World Records. In 1964, a 17-year-old high school student named Randy Gardner beat the world record for sleep deprivation by staying awake for 264 hours (11 days) without using any stimulants.
How to Stay Awake Naturally. With more and more of us getting less and less sleep, itâs tempting to reach for a Red Bull or an espresso when we feel sleepy at work. But consuming caffeine to combat sleepiness can lead to a vicious cycle. The java jolt that helps you stay awake can take up to eight hours to wear off. Caffeine can also reduce your sleep time, alter the normal stages of sleep, and decrease the quality of your sleep.