Interesting science facts

1.Why do doctors wear green or blue clothes during Operation?

In early 20th century, one doctor used green because he

Thought it would be easier on a surgeons eyes and looking at green or blue can refresh a doctors vision of red things including the blood, stains etc, of a patient. If a surgeon stares at something that’s red and pink, he becomes desensitized to it .

2) Who invented blood groups ?

Austrian physician karl landsteiner discovered ABO blood

Group in 1900. He was awarded nobel prize in 1930 for this discovery.

3) Which part of human eye is transplanted from a dead donor a to living person ?

Cornea because it doesn’t have any blood supply . Whenever a person is dead , the blood supply will stops and hence the organs are damaged instantly . But as cornea doesn’t have blood supply, it can be in good condition upto 4-5hrs . And other part of eye is directly connected to brain .

4) Why does cyanide causes instant death ?

Because it breaks the electron transport system in human body

5) What is cosmology ?

Cosmology is defined as the study of the universe, including origin, evolution and destiny .

6) How long it take for a red blood cell to circle the whole body ?

20 second

7) Does vitamin present in sunlight ?

➢ No, sunlight doesn’t contain any vitamin . It is the source of light and energy but vitamin-D formation is takes place when sunlight reacts with dehydrocholestrol, which is present in our skin .

8) Why chilli is hot ?

➢ A chemical is present in chilli, it is called Capsaicin. Because of this chemical , chilli is hot and peppery taste. The chemical stimulates some area like skin, tounge that normally produce heat and pain, fooling the brain into thinking they are burning

9) Why milk tastes sweet but curd taste sour ?

Milk have a sugar named lactose in it which is sweet. But when it is converted into curd, lactobacillus bacteria converts the lactose into lactic acid which tastes sour as it is an acid .

10) Which acid is present in ant sting ?

➢ Methanoic acid or formic acid .

Question for readers

11) Which acid is present in mango ?

-Lavanya .N