Serving and protecting the United States is a big responsibility. But its seven services have things covered, even outer space. Tonight it’s sea versus sky as we...
Every civilization needs resources. Wood, then coal, then oil, then sunlight. Each step up the ladder means learning to use something bigger than whatever came before...
Scientists have a threshold for planetary destruction. An object roughly 96 kilometers wide, striking Earth, would wipe out every living thing on the surface. Jupiter...
Every Blazar We Can See Is Already Aimed at Earth, and Here Is How Long We’d Have
Here is the part that unsettles astronomers. Every blazar we can see is already pointing its jet directly at Earth. Not most of them. All of them. Any blazar aiming its...
It starts with a signal. Faint, strange, and unlike anything humanity has ever recorded. Within hours, it escalates into an event that changes the course of history as...
[dx_custom_adunit mobile_id=”RTK_v1lP”] What if…. you could swim in Titan’s lakes? Saturn’s largest moon, Titan, is unique. It has its own...
Billions of years from now, the Sun will enter the final stage of its life. It will swell into a massive red giant before eventually shrinking into a stellar remnant...
Rise. and. shine! Get up and seize the day! You can do anything under the sun…when the sun powers everything. Your phone, your home, and all that’s in...
In 1850, 94% of the world’s population lived in extreme poverty. Today, we’ve managed to bring that number down to roughly 10%. And if this trend continues...
In a galaxy far away, gravity didn’t quite work the way it does on Earth. And the speed at which everything moved was really weird too. Maybe, some places in our...
In 2018, a British woman named Holly spent a day in the sun in Tenerife, Spain. That evening she noticed her face beginning to swell, so she did the most natural thing...
Would you like to have breakfast with a bear? How about a playdate with a snake? Or play pool with a chimp? This might shock you. But wild animals should be in the wild...
Every time you watch a thunderstorm outside your window, you’re witnessing the energy of an atomic bomb. Now imagine harvesting that raw energy and using it to...
But how would a second moon affect the ocean tides? Would months on Earth become longer or shorter? And would these two satellites inevitably collide to cause a...
Look out. There’s an object hurtling toward Earth at the speed of light! And no, it’s not a comet or an asteroid. Yep. It’s a marshmallow. How could a marshmallow ever...
Human beings have existed for 300,000 years and have managed to live in many unstable environments. We’ve survived ice ages, devastating pandemics and world wars...
The captain sounds the alarm. The waters around the ship rumble. Strange lights from deep below inch closer and closer to you. Something is emerging from the Mariana...
The moment Apollo 11 touched down on the Moon in 1969 became one of the most defining events in human history. Around 600 million people watched as humans stepped onto...
What if human history ended today?
Imagine walking down a busy city street and passing someone who looks almost human but not quite. They are shorter, broader, with a larger brow ridge and a more powerful...

