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Ep136: The Extinction of Dinosaurs · Kidcast Daily

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  Welcome to Kid Cast Daily, where we bring news, trivia, fun
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  facts, and more just for curious kids like you.
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  Today we're traveling way, way back in time, so grab your
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  imaginary time machines and get ready because we're about to
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  explore one of the coolest mysteries in all of science, the
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  extinction of the dinosaurs. Imagine stepping outside and
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  seeing a world filled with giant creatures, some as tall as
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  houses, some with long necks, some with sharp teeth, and
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  others with bumpy armor. That was Earth around 66,000,000
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  years ago, during the time of the dinosaurs.
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  Dinosaurs ruled the land, the sky, and even the water.
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  They were the superstars of their time.
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  But then something incredible happened.
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  Almost all the dinosaurs disappeared.
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  Poof, gone. It's one of the greatest
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  mysteries of all time. So what happened to them?
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  Let's find out together. First, let's talk about what
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  extinction means. Extinction is when a kind of
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  animal or plant disappears from the earth forever.
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  It means there are no more left. Dinosaurs aren't the only
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  animals to go extinct, but their extinction is super famous
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  because they were so big and amazing.
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  Now scientists call the time when the dinosaurs disappeared
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  the Cretaceous Paleogene extinction event.
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  Whoa, that's a big name. Let's just call it the Big Dino
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  Wipeout. This event happened about
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  66,000,000 years ago, and it didn't just affect dinosaurs.
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  Lots of other animals and plants went extinct too.
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  Some scientists say that as many as three out of every four
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  living things on Earth vanished during the big Dino wipeout.
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  But why did this happen? Well, scientists have a few
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  ideas, but one is the most popular.
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  Picture this. You're playing outside and
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  suddenly a huge fiery rock falls from the sky.
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  That's what happened to Earth. A giant asteroid, which is a
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  huge space rock, crashed into our planet.
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  Scientists think this asteroid was as big as a mountain, maybe
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  even bigger. It hit a place that we now call
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  the Yucatan Peninsula in Mexico. The spot where it landed is
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  called the Cheek Shaloob Crater. If you could see it from space,
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  you'd notice a giant dent in the Earth.
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  When the asteroid hit, it was like the biggest explosion ever.
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  Imagine all the fireworks you've ever seen going off at once, but
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  a million times bigger. The impact sent dust, ash, and
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  tiny rocks flying up into the sky, covering the whole planet
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  in a thick dark cloud. It got so dark that the sun's
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  light couldn't reach the ground. Imagine having to wear
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  sunglasses even at lunchtime because it's so gloomy.
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  Without sunlight, plants couldn't grow.
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  And if plants can't grow, the plant eating dinosaurs like
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  Triceratops and Brachiosaurus had nothing to eat.
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  And if the plant eaters disappeared, then the meat
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  eating dinosaurs like Tea Rex and Velociraptor didn't have any
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  food either. It was like a giant game of
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  dominoes. When one falls, the rest start
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  to fall too. But wait, there's more.
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  The blast from the asteroid was so hot that it started wildfires
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  all over the world. The air got smoky and the
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  temperature dropped, making it really cold, almost like a
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  sudden winter. This impact winter lasted for
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  months, maybe even years. Many animals and plants just
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  couldn't survive in those harsh conditions.
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  Now, here's a fun fact. Did you know that scientists
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  have actually found a thin layer of special rock all over the
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  world that was made at the time of the Dino Wipeout?
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  This rock has a lot of Iridium in it, which is a rare metal
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  usually found in asteroids. It's like a secret clue left
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  behind from the day the asteroid hit.
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  But some scientists think there were other things happening too.
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  Around the same time, there were massive volcanoes erupting in a
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  place called India. These volcanoes were so big they
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  covered the land in lava and sent even more dust and gas into
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  the air. It's kind of like Earth was
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  having a really bad day. Asteroids from above and
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  volcanoes from below. So which was it?
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  Asteroid or volcanoes? Most scientists think the
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  asteroid was the main reason, but the volcanoes didn't help.
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  It was a 1-2 punch that changed the world forever.
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  You might be wondering, if the dinosaurs all disappeared, how
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  do we know they ever existed? That's where fossils come in.
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  Fossils are like nature's time capsules.
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  They're pieces of bones, teeth, or even footprints that have
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  turned to stone over millions of years.
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  By studying fossils, scientists called paleontologists can
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  figure out what dinosaurs looked like, what they ate, and even
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  how they moved. It's a little like being a
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  detective, but instead of solving crimes, they're solving
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  the mysteries of the past. Here's another cool did you know
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  moment Not all dinosaurs went extinct.
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  Wait, what? That's right, scientists believe
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  that birds, the ones you see in your backyard or at the park,
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  are actually modern day dinosaurs.
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  So the next time you see a Robin or a pigeon, you can imagine it
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  as a tiny feathery dinosaur. How cool is that?
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  After the big Dino wipeout, Earth was a very different
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  place. With the dinosaurs gone, new
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  animals started to take over. Mammals, which were small and
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  furry at the time, began to grow bigger and try new things.
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  Eventually, some of those mammals became the animals we
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  know today, like elephants, whales, and yes, even us humans.
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  Let's take a quick recap of what we've learned today.
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  Dinosaurs ruled the Earth for millions of years, but about
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  66,000,000 years ago, something dramatic happened.
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  A giant asteroid crashed into Earth, causing darkness,
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  wildfires, and a long cold impact winter.
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  This made it really hard for plants and animals to survive,
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  and most dinosaurs went extinct. At the same time, giant
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  volcanoes were erupting, making things even worse.
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  But not all dinosaurs vanished. Birds are their feathery
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  descendants, still living with us today.
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  Isn't it amazing how one event can change the world so much?
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  The extinction of the dinosaurs was sad for them, but it opened
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  up new opportunities for other animals, including mammals like
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  us. It also gives us a chance to
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  learn about our planet's history and to imagine what life was
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  like long before people came along.
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  So the next time you see a bird, look at a fossil, or even just
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  watch a dinosaur movie, remember the incredible story of the
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  dinosaurs and their mysterious extinction.
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  Who knows what other secrets are waiting to be discovered right
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  under our feet? Thanks for joining us on Kid
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  Cast Daily. Keep asking questions, keep
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  exploring, and remember the world is full of amazing stories
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  just waiting for curious kids like you to discover them.
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  See you next time.