Charles Q. Choi
SPACE.com
United States
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Past articles by Charles:
Signs of Mars life may be too elusive for rovers to detect
Sample return is likely our best bet to find Mars life, if it ever existed, a new study suggests. → Read More
Uranus up close: What proposed NASA 'ice giant' mission could teach us
A proposed NASA mission to Uranus would shed light on the mysterious ice giant as well as a type of exoplanet that's among the most common in the universe. → Read More
Space diet rich in veggies and fish could boost astronaut heath
A new study showed results after just 45 days in a spaceflight-simulating chamber here on Earth. → Read More
Sending atomic clocks close to the sun could unlock the secrets of dark matter
Scientists have proposed a new way to discover the nature of dark matter: using ultraprecise atomic clocks to monitor the quantum vibrations of atoms near the sun. → Read More
'Planet factories' may explain mysterious diversity of super-Earth alien worlds
Researchers may be able to explain the origin of these enigmatic worlds and also that of other rocky planets and moons, including Earth and its siblings. → Read More
This wild interstellar picogram probe idea could carry engineered microbes to other stars
Microbes carried by laser-propelled sails could serve as interstellar probes that can build communications stations to phone home from Alpha Centauri. → Read More
Wind farms on Mars could power future astronaut bases
Even though winds on Mars are weak, they could be sufficient to provide power for future exploration and colonization of the Red Planet, a new study finds. → Read More
Mars sports massive hidden plume of searing rock
A plume of searing hot rock as wide as the continental U.S. is rising up from near the core of Mars and might help explain recent volcanism and earthquakes seen at the Red Planet, scientists say. → Read More
Megatsunami swept over Mars after massive asteroid hit the Red Planet
A Martian megatsunami may have raced across the Red Planet after a cosmic impact similar to the one that likely ended Earth's age of dinosaurs, a new study finds. → Read More
New class of exoplanet! Half-rock, half-water worlds could be abodes for life
A new type of exoplanet has been discovered around the most common stars in the universe. The find may have great consequences in the search for alien life. → Read More
How many meteorites hit Earth every year?
Earth is constantly showered by space rocks, but how many of these actually land on Earth's surface? → Read More
Why pummeled planets may be promising abodes for alien life
Cosmic impacts may create water-hosting cracks and pores in a planet's crust. → Read More
Want to grow plants on Mars? High school student project finds 2 tricks for Red Planet
The soil and water of Mars are normally too harsh for crops, but research led by a then-high school sophomore finds that alfalfa plants and photosynthetic bacteria might help make Martian soil and wat → Read More
Bizarre meteorite is 1st to show scars from pebble-shooting asteroid
A meteorite on Earth holds new evidence that asteroids do indeed mysteriously spit out pebbles, a new study finds. → Read More
Scientists pinpoint Martian origin of 4.5 billion-year-old 'Black Beauty' meteorite
Scientists think they've pinpointed the location on Mars where the meteorite NWA 7034, nicknamed 'Black Beauty,' came from. The findings reveal clues about the origins of Mars and Earth. → Read More
Alien super-Earths may get a habitability boost from hydrogen-rich atmospheres
Alien rocky worlds cocooned in hydrogen and helium could prove habitable to life as we know it for billions of years, with key features such as temperate conditions and liquid water, a new study finds → Read More
Scientists peer inside a Mars meteorite to check for signs of a habitable world
Liquid water once shaped the rock inside a meteorite from Mars, but likely did not support any microbial life, a new study finds. → Read More
Meteorites could have brought all 5 genetic 'letters' of DNA to early Earth
These key building blocks of life were found in space rocks, scientists confirm. → Read More
Hubble Space Telescope spots most distant single star ever seen
Meet Earendel, a star 12.9 billion light-years from Earth. → Read More
Giant radiation bubbles created by monster black hole feeding frenzy, new study suggests
Two giant bubbles of gamma rays and X-rays that erupted from the center of the Milky Way may stem from a supermassive black hole's feeding frenzy at the heart of the galaxy, a new study finds. → Read More