Explanation

•  On 3 December 1967, the world's first human-to-human heart transplant was performed by Dr. Christiaan Barnard
• at Groote Schuur Hospital in Cape Town, South Africa.
  
• Barnard performed a heart transplant on his patient, Louis Washkansky.
•  Louis Washkansky, 53, with heart failure the donor, Denise Darvall, was just 25.

***

ND3-12-2022

Explanation

Explanation

Water has maximum density at 4°C.

When Water is in its Solid form (Ice) below 0°C.

Explanation

The poles experience six months of the day and six months of the night.

This is since earth is tilted on its axis.

Also, due to this, each pole is tilted towards and away from the sun for about six months.

When the North Pole is tilted towards the sun, it has continuous daylight.

Explanation

Lack of insulin causes diabetes.

Diabetes is a condition that happens when your blood sugar (glucose) is too high.

It develops when your pancreas doesn't make enough insulin.