About 3.8 billion years ago, the inner planets were bombarded with a cataclysm of asteroids. Could Planet V have been the cause?
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For hundreds of millions of years, most of the starlight never made it through space. Here’s how that changed. Forming stars sounds like the easiest thing in the Universe to do. […]
Traveling to Mars is going to be hard. Not going completely bonkers when we’re there may be even harder.
The CEO once said a self-sustaining Mars colony won’t work if it’s wildly expensive for each person to make the voyage.
The coming few years should really tell us a lot more about them.
If dark energy is causing the Universe to disappear, how can we still find and see ultra-distant stars and galaxies? In the 1920s, scientists discovered that the Universe was expandingbased […]
Mars will never look as big as the full Moon. But it isn’t even the biggest planet. From humanity’s perspective, the Sun and Moon always dominate Earth’s skies. The Moon and […]
It wasn’t just the Milky Way and Andromeda two billion years ago. Here in the Local Group, our two largest galaxies dominate: Andromeda and the Milky Way. Our Local Group of […]
Particle physics is everywhere, even in the palm of your hand. When you hold out your palm and point it towards the sky, what is it that’s interacting with your hand? […]
Michelle Thaller from NASA examines if it’s possible to put up a giant disk to block out the sun’s rays and cool Earth.
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Astronauts aren’t floating in space, they’re free falling—and so are you. Here’s the amazing science behind so-called zero gravity.
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The most massive star in the known Universe is 260 times as heavy as our Sun. But viewing the early Universe will shatter that record. Place enough mass together in one […]
NASA is developing something called an X-Plane that could potentially bring back supersonic speeds to the skies.
As more time passes since the Big Bang, more of the Universe comes into view. But how much? Even though it’s been billions of years since the Big Bang, there’s a […]
A new genetically-modified pothos ivy plant is exceptionally skilled at removing dangerous pollutants, such as benzene and chloroform, from the surrounding air.
If the universe is expanding in all directions, why is Andromeda hurtling toward the Milky Way?
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Stars don’t stay the same throughout their life, and the Sun is no exception. Here’s what’s going on. Here on Earth, the ingredients for life to survive, thrive, evolve, and sustain […]
White dwarfs, neutron stars, and brown dwarfs aren’t actually stars at all. Here’s why. When it comes to stars, there’s a huge variety of different types out there. Our Sun is […]
If we ever discover the true size of the universe, we’ll likely have galaxies to thank. The trillions of massive star clusters we’ve observed are sending light from the early universe back to us.
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All protons have the same exact mass as every other proton. For particles like the Higgs boson, this isn’t true. One of the most puzzling aspects of quantum physics is how […]
Not everyone is satisfied with the Big Bang. But every alternative is a disastrous failure. It’s treated as though it’s an unassailable scientific truth: 13.8 billion years ago, the Universe […]
Finding the ingredients for life is a very different prospect than finding the products of life. Perhaps the greatest quest in science today is to find life that originated beyond Earth. […]
Shortly after the Big Bang, the Universe became completely dark. The first stars, when they ignited, changed everything. For perhaps 100 million years, the Universe was devoid of stars. The […]
It took more than 9 billion years for Earth to form: the only known planet housing life. But it could have happened much, much sooner. The cosmic story that unfolded following […]
The planet has had life on it, in some form or another, for nearly as long as Earth has existed. If you came to our Solar System right after it formed, […]
We love citing the big names in science. Einstein. Curie. Sagan. Nye The Science Guy. But does that lower the bar for the rest of the workaday scientists out there?
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Having ‘high levels of intelligence’ is no excuse for rejecting quality scientific information. You think of yourself as a generally intelligent person, don’t you? Someone who’s good at deducing fact […]
The line-in-the-sand was drawn in sharpie, and the time to declare ‘no more’ is now. When you have a question about the physical world, there are a lot of different approaches […]
The Mars landing is a reminder that we never know what—or whom—we might discover out there.
Between Carl Sagan’s laughter, the brainwaves of somebody in love, and a live theremin concert, humanity has sent a lot of data out into the stars.