249 questions and answers in this section
Explain why can prolonged exposure to the sun damage our skin?

Explain why can prolonged exposure to the sun damage our skin?

Ultraviolet (UV) rays penetrate the surface of our skin and enter its cells, creating significant cellular stress. They generate what are known as free radicals, unstable molecules...

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Explain why steaming is considered a healthy cooking method?

Explain why steaming is considered a healthy cooking method?

Steaming preserves vitamins and minerals particularly well because it limits their loss in the cooking water. When you boil vegetables, some of the valuable nutrients...

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Explain why some ingredients in cosmetics can cause allergies.

Explain why some ingredients in cosmetics can cause allergies.

Cosmetic allergies are generally due to an excessive reaction of the immune system. Basically, the body mistakes a normally harmless ingredient for a threat and...

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Explain why our dreams are often more intense during periods of stress?

Explain why our dreams are often more intense during periods of stress?

When you’re stressed, your brain becomes especially active in certain areas related to emotions and memories. Notably, the amygdala, a small brain structure that manages...

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Explain why can remembering dreams be difficult for some people?

Explain why can remembering dreams be difficult for some people?

During sleep, your brain goes through several distinct phases, such as slow sleep and paradoxical sleep. It is mainly during paradoxical sleep that you have...

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Explain why do the bacteria in our intestines influence our mood?

Explain why do the bacteria in our intestines influence our mood?

Our intestines communicate directly with our brain through an axis called the gut-brain axis. The gut microbiota, consisting of billions of bacteria in our digestive...

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Explain why public fountains often have non-potable water?

Explain why public fountains often have non-potable water?

Drinking water is water that can be consumed safely without health risks. To achieve this, it undergoes a precise treatment to remove microbes, viruses, chemicals, or dangerous...

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Explain why is the town of Wittenoom (in Australia) considered toxic and abandoned?

Explain why is the town of Wittenoom (in Australia) considered toxic and abandoned?

By the 1930s, Wittenoom became famous for mining blue asbestos (also known as crocidolite). Mining activities escalated in the 1940s and peaked in the 1950s, making the...

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Explain why can stress have a negative impact on short-term memory?

Explain why can stress have a negative impact on short-term memory?

Stress is a natural reaction of your body to a situation perceived as threatening or difficult to manage. In small doses, it can be helpful...

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