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Position-time graphs | One-dimensional motion | AP Physics 1 | Khan Academy
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Analyzing a resistor circuit with two batteries | Electrical engineering | Khan Academy
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Did Mr. Beast really stay underwater for 24 hours straight?
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Playing Baseball with EXPLODING ORBEEZ and Colored Powder Run at 5000FPS!!
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HOW TO PICK A COLOGNE - Scentual Science - Smarter Every Day 125
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The Aufbau principle | Atomic structure and properties | AP Chemistry | Khan Academy
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Huge Tsunami or Marine Weapon? | What on Earth?
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In 19th c. New England, wealth didn’t spare you parasites
Parasitic infections were likely widespread in New England, even in remote areas and in wealthy households, report archaeologists who analyzed excavated fecal samples.nParasitic infections, including tapeworm and whipworm, were a common problem in the United States until the 20th century. The common belief is that these infections mainly affected lower-income, urban areas where conditions—including shared public spaces, lack of sewage systems, and poor sanitation—were prime for disease sprea [...]
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Listen: Have aliens already visited us?
One scientist claims aliens have already visited us and we should invest more in searching for extraterrestrials.nAvi Loeb is a theoretical physicist, former chair of the astronomy department at Harvard University, and author of a new book called Extraterrestrial: the First Signs of Intelligent Life Beyond Earth (HMH Books, 2021).nFor the past few years, he’s argued that an alien artifact, called Oumuamua, passed by Earth in 2017.nAs you can imagine, a Harvard professor going on record that al [...]
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