Amazing facts for kids

The number of synapses (connections between nerve cells) in the human brain is estimated to be around 100 trillion.

The number of synapses (connections between nerve cells) in the human brain is estimated to be around 100 trillion.

Blood is constantly being produced in the bone marrow, with about 2.5 million new red blood cells formed every second.

Blood is constantly being produced in the bone marrow, with about 2.5 million new red blood cells formed every second.

Fingernails generally grow faster than toenails, and the nails on the middle fingers tend to grow faster than the others.

Fingernails generally grow faster than toenails, and the nails on the middle fingers tend to grow faster than the others.

Your lungs can float on water. Coughing is a reflex to clear the airways and protect the lungs from irritants.

Your lungs can float on water. Coughing is a reflex to clear the airways and protect the lungs from irritants.

The heart's electrical system is so powerful that it can create sparks, which can be seen with the naked eye.

The heart's electrical system is so powerful that it can create sparks, which can be seen with the naked eye.

Your brain can store an estimated 2.5 petabytes of information, equivalent to three million hours of TV shows.

Your brain can store an estimated 2.5 petabytes of information, equivalent to three million hours of TV shows.

Your eyes blink about 17 times per minute. They can focus on about 50 things per second and distinguish between 500 shades of gray.

Your eyes blink about 17 times per minute. They can focus on about 50 things per second and distinguish between 500 shades of gray.

Hair is an excellent insulator, providing protection from the sun's harmful UV rays and helping to regulate body temperature.

Hair is an excellent insulator, providing protection from the sun's harmful UV rays and helping to regulate body temperature.

The liver receives a dual blood supply: oxygenated blood from the hepatic artery and nutrient-rich blood from the portal vein.

The liver receives a dual blood supply: oxygenated blood from the hepatic artery and nutrient-rich blood from the portal vein.

Humans have around 2,000 to 4,000 taste buds on their tongues, with each taste bud containing between 50 to 100 taste receptor cells.

Humans have around 2,000 to 4,000 taste buds on their tongues, with each taste bud containing between 50 to 100 taste receptor cells.

The sense of smell is closely linked to memory and emotions, with certain scents triggering vivid recollections and feelings.

The sense of smell is closely linked to memory and emotions, with certain scents triggering vivid recollections and feelings.

Humans shed millions of skin cells daily, and it's estimated that an individual sheds about 8 pounds (3.6 kilograms) of skin cells each year.

Humans shed millions of skin cells daily, and it's estimated that an individual sheds about 8 pounds (3.6 kilograms) of skin cells each year.