• Articles

    Why Mars Died, and Earth Lived

    The Mars rover, Curiosity, is the latest in a long line of missions to Mars… Landers sent to scoop its soil and study its rocks, orbiters sent to map its valleys and ridges. They are all asking the same question. Did liquid water once flow on this dry and dusty world? Did it support life in any form? And are there remnants left to find? The science that comes out of these missions may help answer a much larger, more philosophical question… Is our planet Earth the norm, in a galaxy run through with life-bearing planets? Or is Earth a rare gem, with a unique make-up and history that allowed…

  • The Giant, Amazing Machines NASA Built for the Shuttle
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    The Giant, Amazing Machines NASA Built for the Shuttle

    [ ♪ Intro ] The Space Shuttle may have been out of commission for nearly a decade now. But it’s still arguably one of humanity’s greatest achievements. Unlike the rockets and capsules we use today, the shuttle was ideal for short trips to space. You could launch into orbit, stay there for a couple of weeks to do what you needed to do, then come home and touch down on a runway like it was just another transatlantic flight. Thanks to the shuttle, we were able to repair the Hubble Space Telescope multiple times and build the International Space Station. Exploration today would be vastly different without it. But no…

  • How to take a picture of a black hole | Katie Bouman
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    How to take a picture of a black hole | Katie Bouman

    In the movie “Interstellar,” we get an up-close look at a supermassive black hole. Set against a backdrop of bright gas, the black hole’s massive gravitational pull bends light into a ring. However, this isn’t a real photograph, but a computer graphic rendering — an artistic interpretation of what a black hole might look like. A hundred years ago, Albert Einstein first published his theory of general relativity. In the years since then, scientists have provided a lot of evidence in support of it. But one thing predicted from this theory, black holes, still have not been directly observed. Although we have some idea as to what a black hole…

  • ★ How to Get to Mars. Very Cool! HD
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    ★ How to Get to Mars. Very Cool! HD

    We don’t fire a rocket motor all the way to mars. We don’t need to You just place the spacecraft on a trajectory to mars and let it coast for seven months and 300 million miles until it reaches the planet Atmospheric entry in 3.. 2.. 1.. Just passed in one minute that atmospheric entry current altitude 121 miles, current velocity 12,084 miles per hour We are now at an altitude of 73 miles moving at a speed of 12,192 miles per hour expected parachute deploy in five seconds four three, two, one, Mark We’re awaiting confirmation parachute has deployed Parachute was detected Heat shield deployed event Spacecraft reporting the…

  • Where are all the aliens? | Stephen Webb
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    Where are all the aliens? | Stephen Webb

    I saw a UFO once. I was eight or nine, playing in the street with a friend who was a couple of years older, and we saw a featureless silver disc hovering over the houses. We watched it for a few seconds, and then it shot away incredibly quickly. Even as a kid, I got angry it was ignoring the laws of physics. We ran inside to tell the grown-ups, and they were skeptical — you’d be skeptical too, right? I got my own back a few years later: one of those grown-ups told me, “Last night I saw a flying saucer. I was coming out of the pub after…

  • Model Rocket Battle | Dude Perfect
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    Model Rocket Battle | Dude Perfect

    Hey! Good news! It did not kill a cow! [rock music] 3-2-1! ANNOUNCER: Dude Perfect The rules of this battle are simple. Whoever’s rocket travels the highest is the winner. Oh, and by the way, you get to add 300 feet to your height if you catch it. Ladies and gentlemen, prepare yourself for a metaphorical mind grenade. The Silver Bullet. May I present to you… Cody’s Traffic Cone. The Bumblebee. I’d like to introduce you to the Aerodactyl. Oh, I’m sorry. Could you guys already see it, because it’s absolutely enormous? Welcome to the Bounty Hunter. This thing is built for speed. It’s light, it’s fast. Wings on either…

  • Michio Kaku: The Universe in a Nutshell (Full Presentation)
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    Michio Kaku: The Universe in a Nutshell (Full Presentation)

    My name is Professor Michio Kaku.  I’m a professor of theoretical physics at the City University of New York and I specialize in something called string theory.  I’m a physicist. Some people ask me the question, “What has physics done for me lately?  I mean, do I get better color television, do I get better internet reception with physics?”  And the answer is yes.  You see, physics is at the very foundation of matter and energy.  We physicists invented the laser beam, we invented the transistor.  We helped to create the first computer.  We helped to construct the internet.  We wrote the World Wide Web.  In addition, we also helped…

  • Model Rocket Battle 2 | Dude Perfect
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    Model Rocket Battle 2 | Dude Perfect

    TY: Launching in 3 2 1 Dude Perfect CODY (Voiceover): The rules of this battle are simple. Whoever’s rocket travels the highest is the winner. Also, there’s a 300′ bonus if you catch it! TY: ‘Kay, it is time for the 1st rocket launch of the day. Here we are, at the blast zone; as you can see, we’ve got our blast shield, we’ve got the launch pad. Cody is up 1st; it is go time. CODY: Hey guys. Uh, it’s me and the traffic cone. Uh, the Traffic Cone has actually never seen flight; and it never will, ’cause he’s gone. I’ve upgraded to: the Missile. This time, I…