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What’s happening in your body that causes the sensation of fatigue? Not the macro causes like poor sleep, etc. Decrease or increase of a particular hormone or something along those lines?
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Why did the Laurentide Ice Sheet form and receed like it did?
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How are the varying kinetic energies and momentums from different reference frames balanced when dealing with relativistic speeds?
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How many stars in the sky don't exist?
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What does an unborn baby have in it's lungs?
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Why are there dunes?
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In placental mammals, does the placenta come from the embryo or the mother?
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Why is there a visible cone of a tornado when it’s made of rotating air?
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do we have more or less trees than we did 30 years ago?
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Does being exposed to a disease during a period of immunity prolong your resistance?
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Why five fingers? Why not 3, 7, or 9?
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What causes arctic animals to shift between summer and winter coats?
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Are there invasive species from the Americas in Africa/Asia/Europe?
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Mt Rainier lasted erupted in 1450 CE and has a pointy peak. How long does it take for a volcano to turn into a peak?
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How long would it take for the land under antarctica to fully resurface if all the ice above it dissappeared this instant?
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How long does an `evolution` of a rhinovirus last before going extinct?
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Is energy actually conserved?
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How can gene edits prevent viral infection?
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It is widely said that age of the universe is around 14 billion years. According to whom?
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Why did NASA's Orion capsule change colour after reentry?
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Why were there massive spikes in exoplanets discovered in 2014 and 2016?
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How does both nuclear fusion and nuclear fission release energy?
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Axiomatic definition of classes of L functions?
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How exactly does the Pauli Exclusion Principle play a role in contact forces vs electrostatic repulsion?
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Why is one side of the Mississippi River flat, and the other side hilly?
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What dictates which field is excited in QFT?
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If moving at near (90+%) light speed, can a person travel 'n' light-years and experience LESS than 'n' years, or is their minimum perceived travel time equal to the number of light years in the journey?
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What were all the small explosion tests in Oppenheimer?
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How is the Internet speed at the ISS over 1GB/sec?
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Which river on earth is currently changing its course the fastest/slowest? How can we tell?
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How do birds know which way is south?
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How do researchers quantify depression,anxiety,bipolar etc in mice models?
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Can crows from different regions communicate?
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How can eyes heal themselves when they have immune privilege?
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How fast do macrophages move around?
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Why do some insect fossils still have colors ?
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How does lactose enter lac operon?
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What is the deal with co-occurring allergies that don't make sense in terms of clades?
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What's the layman definitions for the SI units?
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Why can't cats with FIV (Feline Immunodeficiency Virus) be given medication for HIV (Human Immunodeficiency Virus)?
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How do researchers give lab rats cancer?
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Why do banana peels connected to the banana turn black in the fridge even if not ripe?
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What's the limit to the placebo effect?
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Do octopodes change color beyond the visible spectrum of light?
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Is the flavor of a strawberry concentrated in certain parts of the fruit, or is it distributed evenly throughout?
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Why is body/facial hair such a strongly sex-linked trait in humans? Is there any potential evolutionary reason for it being correlated with testosterone and present largely only in males?
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if you put a scale underwater with the face pointing up, would it show the weight of the water above it?
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How is it possible to hear sound under water?
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How do ecosystems function?
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What are the fundamental forces of nature?
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How do electric and magnetic fields interact?
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What is the process of mitosis and meiosis?
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What is the significance of the Hubble Space Telescope?
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What is evolution?
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Why do leaves fall in autumn?
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Why do we have seasons?
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How do planetary rings form?
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How do cameras work?
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Why does salt melt ice?
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What are allotropes and how do they differ?
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How do hormones regulate bodily functions?
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What is a supernova?
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What causes thunder?
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What is the role of ribosomes in protein synthesis?
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What causes earthquakes?
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How TVs switched from b&w to color?
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What are the different types of sedimentary rocks?
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What is the periodic table and how is it organized?
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What is the role of environmental monitoring in protecting ecosystems?
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What are the processes of tectonic deformation?
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What are the effects of urbanization on natural habitats?
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How does light behave as both a wave and a particle?
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How do we study and manage air quality?
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What are the effects of land use change on ecosystems?
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What is the role of conservation biology in protecting species?
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How do we study and protect wetlands?
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why are heartbeat, pulse, breathing like a wave? Why do wave exists in the universe?
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What is the role of neurotransmitters in the brain?
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What are the layers of the Earth?
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How do plants reproduce sexually and asexually?
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What is the role of geochemical cycles in the Earth's system?
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How are mountains formed?
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