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Vaccines act as immune system trainers, triggering innate immunity first, then activating adaptive immunity to produce antibodies and T - cells, and forming memory cells for long - term protection.
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If Earth's rotation doubles from 24 to 12 hours, it'd lead to catastrophic changes including gravity loss, climate collapse, biological rhythm disruption, geological instability, ending modern civilization soon.
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Apple browning, an enzymatic process driven by PPO, polyphenols, and oxygen, occurs when cells are damaged, exposing these components. It can be controlled by pH, temperature, and oxygen, and serves as a plant defense.
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Iron rusts due to a non - protective oxide layer from a two - step electrochemical reaction, while stainless steel resists rust with chromium's self - healing passive layer. We can protect metals by alloying, coating, etc.
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Doctors wear white coats in general practice as they symbolize hygiene and trust since the germ - theory era, while green ones in surgery to reduce visual fatigue and glare, based on color science.
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On rainy days, car windshields fog up due to temp. difference and moisture - rich air with limited circulation.
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Desert sand comes from local weathering, ancient water - body remnants, and long - distance transport.
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Phones charge faster with fast chargers due to high power, smart battery management, and advanced tech.
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Toothpaste can polish minor CD/DVD scratches; use non - gel, rub outwards, rinse and dry.
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Garlic and onion, common veggies, contain sulfur - compounds to repel mosquitoes naturally.
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Ancient Egyptians aligned pyramids with true north possibly using stars like Thuban or shadow - casting.
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Firefly flash synchronization in swarms likely aids mating and predator avoidance for species survival.
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Calcium peroxide shifted from dental fillings to toothpastes due to bleaching, mildness, compatibility & convenience.
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Honeybees use the waggle dance, with run angle and duration, to share food location and forage as a group.
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Shaving cream with surfactants can create anti - fog layer on mirrors, easy - to - use and cost - effective.
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Mayflies, with an adult lifespan of hours, focus on reproduction after long nymph stages.
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Use lemon juice, baking soda paste, or hydrogen peroxide to remove stains from women's underwear.
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Insects, birds, and reptiles can see UV light (invisible to humans), aiding foraging, mating, etc.
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REM atonia paralyzes skeletal muscles during REM sleep to prevent dream - acting and reduce risks.
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Improper storage of women's underwear may cause fungal, bacterial infections and allergic reactions.
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