Why do cat's eyes glow in dark ??

 Eyes of all animals have retina.

Retina is a thin layer at the back of the eye that absorbs light and changes into signals so that brain can understand.

Behind cat's eye is a mirror called " tapetum lucidum ". Light passes through retina, hits the tapetum lucidum.

This light reflects back through retina. 

The glow in cat's eye is the light bouncing back from tapetum lucidum.

Cats are not the only animals with this ability. All night hunting animals have this.

Cows, sheep, goat and horses have it too probably for spotting predators at night.

Squirrels, pigs, most of the primates including humans don't have this as they are active during daytime.

Interestingly most dogs have this feature.  But is missing in dogs with blue eyes and domesticated breeds  !!!!

Most educated countries in the world

  These sre the most educated countries  ----

1.  Canada 

2.  Ireland 

3.  Japan 

4.  South Korea 

5.  United Kingdom 

6.  Luxembourg 

7.  Australia 

8.  Sweden 

9.  United States of America 

10.  Israel 

Why Japan has blue traffic light ??

 All over the world, red colour traffic signal indicates the vehicles to STOP and green colour indicates GO.

But in Japan, GO signal is slightly blue rather than usual bright green  !!!

The main cause of Japan's so called blue traffic light is based on the language.

Japanese language did not have a clear distinction between the colours green and blue.

Japanese call green vegetables as blue vegetables  !!!

The Japanese traffic lights have slightly blue colour in them.  They are still called BLUE  !!!

Surprising facts about Thar desert

  World's largest desert is cold Antarctic desert.

Smallest desert is Carcross desert in Canada.

Hottest desert Death valley USA 

Coldest desert is Antarctica.

Most colourful desert Thar,  India 

Surprising facts 

1.  Thar is the most densely populated desert.

2.  Geologically Thar desert is relatively young.

3.  Thar receives annual rainfall from Indian monsoon !!!

4.  This region was once under the sea.

5.  It is home to great Indian bustard, one of the heaviest bird in the world.

Why does home made curd develops a watery layer at the the top ??

  My mother prepares the curd in home itself.  She adds one or two drops of already prepared curd to the vessel of milk and closes lt during previous day night.

Today morning, freshly prepared curd is ready to consume for lunch  !!!

My mother always ask me to stir well before using the curd.

On asking the reason, she showed the watery layer on top of freshly prepared curd  !!!

Till now I was not knowing the reason for formation of watery layer on top of homemade curd.

Now I know the reason.

Remember, this watery layer can be seen only on top of homemade curd not on curd bought from shop  !!!

A natural process called SYNERESIS is responsible for the formation of watery layer.

This occurs when the protein network mostly casein that forms the solid part of curd, breaks.

Thereby it squeezes out the trapped liquid.

This liquid is WHEY. It is a nutrient rich byproduct containing protein, calcium and pro biotics.

It is safe to consume and stirred back in.

Watery curd happens when low fat milk is used.

Leaving the curd to set for too long in a warm environment increases the acidity. This causes the protein structure to tighten and expels liquid.

Disturbing the container when curd is setting, interrupts the formation of protein matrix and results in watery curd.