Around 1844, the first three-row bristle toothbrush was invented.
Prior to the 1840s, toothbrushes had only one row of bristles. With the benefit of being able to cover a larger surface area in mind, toothbrush makers began introducing changes to the standard toothbrush design in about 1844. Three rows of bristles would later become the standard for most commercial toothbrushes, proving to be more effective than the previous single row.
Related Facts
Hindi was designated as the official language of India on September 14, 1949. Every year on September 14th, Hindi Day is observed.
Did you Know? The footsteps of the Apollo astronauts on the moon will most likely remain there for at least 100 million years.
The worlds most famous diamond was extracted from south indian mine
Fun Fact! Mary Actually Had a Little Lamb
Budapest has a hidden underground world.
Did you Know? Madagascar is the world’s fourth largest island
Bali is a volcanically active island.
After surviving the Reichenbach Falls, Holmes refused to perish beside his creator.
Mangoes in South India were referred to as aam-kaay in Tamil, which became maam-kaay as a result of the numerous regional dialects there.
Bhutan values happiness above prosperity.
There is an ATM with latin instructions
A well-maintained porcelain piece can last over 1,000 years!
The famous yerwada prison is in Pune.
Did you Know? The reason behind eggs being blue isn't that appealing.
London’s landmarks could have been very different indeed
Starbucks has secret shops.
Heavy Metal's Birthplace
You are more creative solving the problems of others than your own.
Why is Genghis Khan a famous name?
Pancreatitis can result from scorpion stings.
Vincent Van Gogh's Starry Night
Did you Know? There is a record of eating 29 cupcakes in just 30 seconds.
The wings of butterflies are translucent.
Does spirituality help fining meaning in life ?
Korean is difficult to learn for english speakers.