Based on what we know about physics, the universe as we know it should not exist. Scientists posit that it should of been destroyed not long after it was formed. As to why it wasn’t, stands as one of the biggest unsolved mysteries in science. Host Hank Green of SciShow explains.
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Three characteristics dominate the legacy of Tyrannosaurus Rex: It was huge, vicious and had small arms. The story of how it lost those small arms is pretty simple, but why it kept the puny limbs is another tale. PBS Eons host Hank Green fills us in on the details.
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Part of our fascination with dinosaurs is their size. Shaking the earth from the Jurassic to Cretaceous periods, some dinos reached the height of a five-story building. But how did they get so huge? And why did mammals get the short end of the stick? Host Hank Green has some answers in this edition of PBS Eons.
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The majority of prehistoric snake fossils reveal only a few bones. But 90 million years ago, an ancient species, known as najash, was discovered to have legs, some with two, others with four. “And because of this,” PBS Eons host Hank Green says, “the evolutionary history of snakes is among the most mysterious of all the vertebrates.
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Natural history is full of living things that were long thought to have gone extinct, only to show up alive and well. Paleontologists called these organisms Lazarus taxa and many of them vanished 500 million years ago at the end of the Cambrian Period. But did they really vanish? Host Hank Green tells their story in this edition of PBS Eons.
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Although humans have done a decent job of exploring, discovering and mapping every inch of our planet above water, we still don’t have a clue about our massive oceans, which cover 70 percent of Earth. In this episode of SciShow, host Hank Green discusses seven topics about the oceans that remain a total mystery.
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With the proliferation of nuclear weapons on the planet, do we have the ability to destroy ourselves? SciShow host Hank Green says that the entire nuclear arsenal on Earth, mostly concentrated in the United States and Russia, is about 7,000 megatons, which is puny on a universal scale and when compared to natural forces. Granted, if all these weapons were detonated, there would be severe damange to deal with. “But the Earth is pretty sturdy and people are pretty good at surviving,” Green says.
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In a stunning discovery, NASA announced there is sometimes flowing water on Mars, or at least liquid, hydrated perchlorate salts. While NASA welcomes the surprise news, there are many questions to be answered, such as where did the water come from? Is it salty like saltwater? And what exactly does this discovery mean? Hank Green attacks these questions in this edition of SciShow.
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Elon Musk, CEO of SpaceX and Tesla Motors, says we could expedite Earth’s colonization of Mars by nuking the Red Planet. Musk’s point is to make Mars habitable really quickly by nuking its poles. “The idea is the bombs would be a quick way to to terraform Mars, in other words, make the planet capable of supporting human life,” Hank Green says. Green explains in this edition of SciShow.
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Stunningly, biologists are developing a method to create artificial life with DNA that was put together by downloading information from the Internet. SciShow host Hank Green says, “In a sense, it’s the first living thing on the planet with a computer for a parent.” Check out the video as Green presents the elaborate details.
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