SCIENCE
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Ask Ethan: How much damage could a cosmic ray do to a human?
At the upper limits of what’s energetically possible, cosmic rays still persist. What happens if a human gets hit by…
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Yes, one image from space can change humanity’s perspective
Our view of the world, the Universe, and ourselves can change with just one glimpse of what’s out there. It’s…
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Ask Ethan: Where are all the blueshifted galaxies?
Even in an expanding Universe, we expect both redshifted and blueshifted galaxies. But nearly every one we see is redshifted.…
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How a solar radiation storm created January 2026’s aurora
The Sun often produces solar flares and coronal mass ejections, but a rare solar radiation storm made the 2026’s first…
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Ask Ethan: Why do gravitational lenses make crosses, not rings?
Gravitational lenses arise when foreground masses and background light sources properly align. Einstein rings are rare, but crosses abound. Continue…
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It’s time to stop teaching the biggest lie about Hawking radiation
It’s not about particle-antiparticle pairs falling into or escaping from a black hole. A deeper explanation alters our view of…
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NASA watched this supernova blast expand for 25 years
Back in 1604, Johannes Kepler discovered the Milky Way’s last naked-eye supernova. Here’s how NASA’s Chandra sees it over the…
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Ask Ethan: What does “gravitationally bound” mean in the expanding Universe?
When objects are gravitationally bound, they cannot escape from one another’s influence. How does that work within the expanding Universe?…
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Astronomers are on “Cloud 9” with a new, starless gas cloud
Astronomers have found starless gas clouds before, but Cloud 9 might be the most pristine one of all, with big…
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Ask Ethan: Why is there no such thing as antigravity?
In general relativity, matter and energy curve spacetime, which we experience as gravity. Why can’t there be an “antigravity” force?…
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