Why do our fingers wrinkle in water ??

 Its our nervous system doing it on purpose  !!!

The top layer of our skin has only dead skin cells and keratin.  It soaks up water and swells.

The layer underneath has blood vessels and nerves.

When we are in water for 5-10 minutes, nerves under the skin makes the blood vessels to get smaller.

So, outside gets puffy whereas inside skin is getting smaller  !!!

Result :

Skin wrinkles up to get fit

It wrinkles in lines because that is where the skin is attached tighter.

If nerves to our fingers are cut ,  our fingers don't wrinkle in water anymore !!!!

So, skin wrinkling is the work of nervous system......

Wrinkled fingers work like tire treads. They channel water away so that we can hold wet things in better way  !!!

So, skin wrinkling is for better grip.......

Surprising facts about rats

 Rats are not anyone 's favourite animals  !!!

But these small rodents have lived with humans over centuries.

Here are some fascinating facts   ----

1.  Group of rats is known as  " mischief   " !!!

2.  Rats are mostly active at night.

3.  Rats have travelled the world with humans  !!!

4.  Teeth of rats never stop growing.

5.  Whiskers of rats are more sensitive than fingers.

6.  Rats can see in different directions at the same time.

7.  Rats can hear the sounds that humans can't.

8.  Rats leave behind a lot of droppings.

Which country has more venomous snakes ??

 This question was asked on Koun Banega Karodpati program.

Question 

Which country has more species of venomous snakes than any other country in the world  ??

1.  Papua New Guinea 

2.  Botswana 

3.  Australia 

4.  India 

Answer 

It is not INDIA  !!!

India has fewer venomous species of snake. Around 60.

But India has more snake bite deaths  !!!

India ruled out.

Out of 400 venomous snake species globally, this country has about 140+  land snake species and 100 of them are venomous  !!!

17 of 20 venomous snake species found in this country.

This country is little isolated than others and also have harsh environment.

This led to snakes evolving super  potent venom to take down prey fast with little water / energy.

Country         Australia    !!!

The river which never finds an ocean !!!

  This river is one of Africa's most unique waterways.

This is the fourth longest river in southern Africa.

This river rises in the highlands of Angola.

This river forms parts of Angola - Namibia border and then flows to Botswana.

Instead of emptying into ocean, it splits into flat sands of Kalahari desert. This is the largest inland Delta in the world.

This river is known as " river which never finds the ocean "  !!!

It terminates in Kalahari desert.

River    OKAVANGO  RIVER    !!!!

Landslides on Pluto !!!

  Pluto does have land slides..  !!!

Pluto's ground is made of ice, not rocks.

Water ice, there is as hard as granite on Earth !!!

But ice made up of nitrogen and methane are soft.

They just slump down, when slopes get too steep.

On Earth, landslide means mud and rock sliding in rain.

But on Pluto, landslide means huge blocks of super cold ice slowly slumping in super cold weather   !!!

No  rain on Pluto like Earth

But gravity + brittle ice still makes mountains to fall apart !!!!