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#15 In October 1879, Thomas Edison of the United States created a light bulb that emits light for more than 40 hours using a carbon filament, and this was put into practical use by Edison and Swann of England. In 1808, British chemist Humphry Davy invented the arc lamp, but the light was too intense to be used for residential purposes. Many other scientists worked on the invention of the light bulb, but Edison was the first to use it for residential purposes. Swan succeeded in commercializing this and became known as the inventor of the light bulb. thnak you

#17 you are right The world population was said to be China a few years ago due to low accuracy and reliability of the latest data, but the latest data shows that India has a larger population. thanks

@@EASYFUNTRIVIA Fine, it confirms what I said, whatever Edison did for which we are too be grateful, he did NOT invent the light bulb!

#22 Helium has atomic number 2, following hydrogen in the periodic table. It is the lightest element in the universe and accounts for about 25% of the universe's elemental mass. Because helium is inert, it is safe to react with other elements and is used in many fields. Thank YOU!

#6 There are several ways to distinguish blood types. ABO formula, There are Rh type, Lewis type, MNSs type, P type, Kell type, etc. Among them, according to the most popular ABO formula, there are four blood types: A, B, AB, and O. Thnak you!

#15 You may be right. The concept of the strongest muscle is ambiguous. Here, I wanted to express that the strongest muscle is the strength of the heart, which is active until death. thanks.

nice!

You are right. Any land with an average annual precipitation of less than 250 mm is considered a desert. Therefore, the Antarctic Desert may be the largest desert. However, people generally recognize the Sahara Desert as the largest desert. thnak you ~

@@EASYFUNTRIVIA I don't care what people "recognize" - most of them also "recognize" tomatoes as vegetables. The Sahara, whatever people think or believe, is not the largest desert, the Antarctic Desert is!