An almost 40-year-old theory finally has ‘smoking gun’ evidence for it. During most of their lives, stars burn stably, changing imperceptibly. The rotten egg nebula, at lower right (and shown in […]
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If you think of the Big Bang as an explosion, we can trace it back to a single point-of-origin. But what if it happened everywhere at once?
With advanced laser technology and an appropriate sail, we could accelerate objects to ~20% the speed of light. But would they survive?
With sodium-sensitive eyes, we’d see it every new Moon. With no detectable gases, the Moon appears to be atmosphere-free. The Moon as seen from a view above the majority of Earth’s […]
The contact binary system KIC 9832227 is worth another look. Astronomers have seen some incredible occurrences across space and time. The nova of the star GK Persei, shown here in an […]
A levitating vehicle might someday explore the moon, asteroids, and other airless planetary surfaces.
Twin Health lets patients with diabetes see what’s happening inside their own body and can model each patient’s unique metabolism.
The stars, planets, and many moons are extremely round. Why don’t they take other shapes?
We frequently say it’s 2.725 K: from the light left over all the way from the Big Bang. But that’s not all that’s in the Universe.
Saturn’s Iapetus, discovered way back in 1671, has three bizarre features that science still can’t fully explain.
Ingenuity is remarkable. But these 5 exploration ideas are revolutionary. Telescopes are our initial tools for revealing and studying foreign worlds. Hubble images of Mars, particularly around the regions with […]
Life arose on Earth very early on. After a few billion years, here we are: intelligent and technologically advanced. Where’s everyone else?
In just a few seconds, a gamma-ray burst blasts out the same amount of energy that the Sun will radiate throughout its entire life.
Solving difficult visual puzzles seems to help the brain “rewire” itself by forming new neural pathways.
It could one day fuel nuclear fusion reactors.
In 1054, a core-collapse supernova occurred 6500 light-years away. In 2023, JWST imaged the remnant, and might solve a massive mystery.
The universe is filled with unlikely events, but is also full of ways to fool ourselves.
Despite the enormous mass of the Earth, simply depleting our groundwater is changing our axial tilt. Simple Newtonian physics explains why.
If you want to know what the Universe is like, you have to look at it in the right way. Only by observing it can we know what the Universe is […]
Our views from the red planet’s surface are more spectacular than ever. Ever since the earliest spaceflight, humanity has reached for Mars. This photo composite shows Meande Ring, a river on […]
Three fundamental forces matter inside an atom, but gravity is mind-bogglingly weak on those scales. Could extra dimensions explain why?
As particles travel through the Universe, there’s a speed limit to how fast they’re allowed to go. No, not the speed of light: below it.
The past ~4 billion years have been an incredibly successful, unbroken run for life on Earth. The future won’t be nearly so bright.
In the early stages of our Solar System, there were three life-friendly planets: Venus, Earth, and Mars. Only Earth thrived. Here’s why.
The Universe is supposed to be the same everywhere and in all directions. So what’s that giant “cold spot” doing out there?
There are dozens of learning and development conferences to choose from each year. Here are 10 of the most popular, along with what makes them unique.
The last 70 years have taken us farther than the previous 70,000. But can we accomplish more than creating a record saying, “We were here?”
Thanks to a couple of rovers, we know Mars was once blue.
Shortly after planet Earth formed, life took a permanent hold on our surface. But just how common is such an outcome?