1312 questions and answers in this section
Explain why can some lakes form under the ice?

Explain why can some lakes form under the ice?

Water under the ice seems strange, right? Yet, it happens when the glacier rests on a rocky base with natural hollows and depressions. These depressions...

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Explain why windows fog up in winter when the car is heated?

Explain why windows fog up in winter when the car is heated?

Fog is simply water vapor present in the air that turns back into liquid upon contact with a cold surface. Warm air can hold much...

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Explain why Amazonian tribes use specific plants for rituals?

Explain why Amazonian tribes use specific plants for rituals?

For generations, Amazonian tribes have orally transmitted their knowledge about specific plants. Often through training with an experienced shaman or healer, this precious knowledge includes...

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Explain why volcanic ash clouds can be visible for thousands of kilometers?

Explain why volcanic ash clouds can be visible for thousands of kilometers?

During a major eruption, ash clouds can reach impressive heights, averaging between 10 and 20 km in altitude. The most violent volcanoes even eject ash...

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Explain why some stickers leave a sticky residue on windows?

Explain why some stickers leave a sticky residue on windows?

The adhesives used in stickers are mainly composed of polymers. These large molecules with long, flexible chains provide a certain flexibility, allowing them to spread...

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Explain why coffee can leave a residue at the bottom of the cup?

Explain why coffee can leave a residue at the bottom of the cup?

Coffee contains many chemical components such as caffeine, essential oils, acids (for example chlorogenic acid), proteins, as well as aromatic compounds that give coffee its...

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Explain why carrots can have different colors?

Explain why carrots can have different colors?

The classic orange color of carrots mainly comes from beta-carotene, an orange pigment that gives a healthy glow and belongs to the family of carotenoids. But it...

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Explain why were carrots originally purple?

Explain why were carrots originally purple?

Carrots were originally cultivated over 1000 years ago in what is now Afghanistan and Iran, and guess what: they were mainly purple or violet! The...

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Explain why one cannot tickle oneself?

Explain why one cannot tickle oneself?

Tickling activates several regions of the brain, notably the somatosensory cortex, responsible for the perception of touch, and the anterior cingulate cortex, linked to emotional...

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Explain why temperatures in underground caves are generally stable?

Explain why temperatures in underground caves are generally stable?

The rocks surrounding the caves are often excellent thermal insulators. They are very dense and thick, making them particularly poor conductors of heat, thus significantly...

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