Threeyzmonkeys, Author at I Learned This Today

#847 Christiaan Huygens – inventor of the pendulum clock and the balance spring.

January 28, 2024

Christiaan Huygens was a mathematician, physicist, engineer, astronomer, and inventor. He was responsible for many discoveries during his lifetime. He discovered a new way to make more accurate telescope lenses by grinding and polishing them differently, and he used those lenses to find the first moon of Saturn, Titan, and to observe the true shape […]

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#846 Why do we say, “pass the bar”?

January 27, 2024

Why do we say, “pass the bar”? The bar was a physical bar that separated a courtroom between the judges, barristers, and participants, from the spectators and average people. In all English countries, and in some other countries, to become a member of the law profession a person needs to pass the bar exam before

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#845 How do sharks sense electricity?

January 26, 2024

How do sharks sense electricity? With a special organ called the ampullae of Lorenzini. They are not the only sea life that are able to detect electricity. All living creatures give off an electric field. All organisms use energy for a whole range of functions, which means we need to be able to generate it.

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#844 What color is the sea?

January 25, 2024

What color is the sea? It is technically blue, but that depends on the depth and what particles are in the water. The sky is blue because the blue light wavelengths are scattered by molecules in the air. This is not why the ocean is blue. Generally the sea is blue because water absorbs red

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#843 Is a killer whale a whale?

January 24, 2024

Is a killer whale a whale? Yes and no. Yes, because dolphins are technically whales. No, because a killer whale is a dolphin. They are called orcas, although they are more commonly known as killer whales. A killer whale is called a whale because of its size, but it is actually a dolphin. The orca

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#842 Why does an atomic bomb make a mushroom cloud?

January 23, 2024

Why does an atomic bomb make a mushroom cloud? Because of the speed of the blast and the heat from the fireball. We have all seen images of nuclear bombs being detonated and they always have a very distinctive cloud that is in the shape of a mushroom. These mushroom clouds can be tens of

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#841 When were photographs first used in newspapers?

January 22, 2024

When were photographs first used in newspapers? The first photograph was published in a newspaper in 1848, but they didn’t become common for a long time after that. Depending on the type of paper, modern newspapers have a lot of photographs. The percentage and the size of the photographs may vary depending on whether the

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#840 Joseph Lister – introduced antiseptics into surgery

January 21, 2024

Joseph Lister was born in Britian in 1827. He became a doctor in 1950 and a surgeon shortly after. During his career he revolutionized the way surgery was performed, saved countless lives, and made surgery safer for all of us today. He realized that germs were responsible for the majority of deaths after surgery and

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#839 Why is there such a difference between Haiti and the Dominican Republic?

January 20, 2024

Why is there such a difference between Haiti and the Dominican Republic? There are several reasons. Some of them are the climate, their history, their languages, their population densities, and their governments. Haiti and the Dominican Republic are both on the island of Hispaniola, which is an island between Puerto Rico, Jamaica and Cuba. It

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#838 When did daylight savings time start?

January 19, 2024 / 1 Comment

When did daylight savings time start? It started in Canada in 1908. Daylight savings time is the practice of putting the clocks forward by one hour in the summer and back in the winter. The reason for this is to give people more sunlight throughout the year as the length of the day changes with

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Author name: Threeyzmonkeys