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Tectonic plate: Earth’s rigid outer layer is broken up into a bunch of pieces, called tectonic plates. Usually people think of tectonic plates as the Earth’s crust, but the plates are actually made of the crust PLUS the very top of the mantle, which is cool enough to be rigid and hard and stuck to the crust. The crust and the top of the mantle together are called the “lithosphere.” Underneath that is a part of the mantle called the “asthenosphere,” which is the part that oozes and flows.
Subduction Zone: The area where two tectonic plates collide and the denser of the two is forced under and dives down into Earth’s mantle.
Mariana Trench: The subduction zone where the Pacific Plate slides under the Philippine Plate. The edge of the Philippine plate is kind of pulled down in the process, creating a deep crevice in Earth’s surface, known as a deep ocean trench. The Mariana Trench is the deepest ocean trench in the world.
Granite: A type of igneous rock formed when magma cools slowly underground (creating relatively large crystals). Granite is different from other igneous rocks like basalt because it has a higher percentage of low-density minerals like quartz and feldspar.
Oceanic-Continental Convergent Plate Boundary: The boundary between a tectonic plate made of oceanic lithosphere and a tectonic plate made of continental lithosphere. At these “convergent” plate boundaries, the two plates are colliding, and the oceanic plate is forced to subduct, or sink, under the continental plate.
Ring of Fire: A long stretch around the Pacific Ocean where plates are colliding. The majority of volcanoes and earthquakes in the world take place along the Ring of Fire.
Silicate minerals: These are the low-density minerals like quartz and feldspar. They contain SiO2. Because silicate minerals are thick/viscous when melted, magma with lots of silica in it forms very explosive volcanoes, like Mt. St. Helens and Mt. Tambora.
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Our Lungs Have A Fatal Flaw
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Alveolus: any of the many tiny air sacs of the lungs which allow for rapid gaseous exchange.
Bronchiole: any of the minute branches into which a bronchus divides.
PM 2.5: tiny particles or droplets in the air that are two and one half microns or less in width.
PM 10: inhalable particles, with diameters that are generally 10 micrometers and smaller.
Nasopharynx: the upper part of the pharynx, connecting with the nasal cavity above the soft palate.
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Vampire Life is Hard
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Hematophagy: the practice by some species of feeding on the blood of other animals.
Hemoglobin: a protein in red blood cells that carries oxygen.
Free radicals: unstable atoms that can damage cells.
Anticoagulant: a substance that inhibits the coagulation of the blood.
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Do Other Diseases Have "Long" Versions?
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Sequelae: Chronic complications of an acute condition.
RSV: Respiratory Syncytial Virus infects a majority of children before the age of two.
SARS: Severe Acute Respiratory Syndrome is a coronavirus-caused respiratory disease responsible for an outbreak in 2002-2003.
Cytokine Storm: A sudden increase in pro-inflammatory cytokines that causes a severe immune reaction.
Fibrosis: Pathological wound healing that leads to the formation of scar tissue.
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Whale Sounds
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From the creators of the popular science show with millions of YouTube subscribers comes the MinuteEarth podcast. Every episode of the show dives deep into a science question you might not even know you had - but once you hear the answer, you’ll want to share it with everyone you know. Our team of scientists digs into the research and breaks it down into a short, entertaining explanation jam-packed with science facts and terrible puns. We’ll tell the incredible story of how monkeys crossed the Atlantic ocean on natural rafts, and we’ll explain why it gets hotter the deeper you dig underground.