Many of us know our blood type from our parents, or after donating blood for the first time. We feel a sense of pride with our biological distinction, but don't know what it means to be type ___, aside from knowing what type of blood we can receive in transfusions. However, lingering questions remain, such as: why are some blood types more common than others? Blood is made of the same basic elements (red blood cells, white blood cells, platelets, and plasma), but not all blood is alike. Blood types are determined by the presence or absence of certain antigens -- substances that can trigger an immune response if they are foreign to the body, according to the American Red Cross.
A thin boss is less likely to give you a pay rise than a fat one, a study suggests. Lean men were less generous than fat men when dishing out money in a laboratory experiment. And when they did part with their money, skinny people are more generous to people who are also thin than to their chubby counterparts. The study measured blood sugar levels during the game, and the researchers found that lower blood sugar affected judgements. And when thinner people have lower blood sugar, they are at their most stingy, while fatter people, were less affected.
World Blood Donor Day is celebrated on June 14 every year -- an occasion started by the World Health Organization in 2004, in order to raise awareness about the importance of meeting a nation's basic requirements for blood and to prevent potential shortages. Last year's theme was "What can you do? Give often" -- as WHO sought to educate people that the typical response in an emergency scenario is always to ask how one could help. This year's slogan reads: "Be there for someone else. "Transfusion of blood and blood products helps save millions of lives every year.
The effort involved in collecting the blood was as much a science experiment as the art itself. Vtol extracted just under 1.2 gallons of blood over the course of 18 months, and had to fill all but the very last sample with preservatives to prevent the fluid from going bad. As to why the artist would go to all this trouble? He describes it as a "symbolic act" where his life-giving fluid can power a device that's a figurative "extension of myself." It also parallels decades-old Russian philosophy and scientific concepts, where blood transfusion was seen as a metaphysical act -- you're literally sharing yourself with others.
Every blood donation "can save up to three lives", yet come December thousands miss vital appointments to give blood, as the festivities kick in. It can make a huge difference to patients like two-year-old Henry Alderson who needs blood transfusions every two weeks. When donors drop out in such numbers, bloods stocks inevitably dwindle. For Henry, from Harwich, Essex, it could mean the difference between a Christmas spent waiting up for Rudolph and crashing his toys into the tree - and a Christmas spent in bed. He has a rare condition called Diamond-Blackfan anaemia.