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.
40 days awake: Man claims he set world record by not sleeping for 968 hours. A photographer is claiming he set a world record by staying awake for more than 40 days. Tyler Shields, 28, from Los Angeles says he didnât get a wink of sleep for 968 consecutive hours.