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Hubble has revealed a strange cosmic object called Cloud-9, a dark matter-dominated cloud with no stars at all. Scientists believe it is a "failed galaxy," a leftover building block from the early Universe that never lit up. Its discovery confirms .. ...

Scientists in South Korea have discovered a way to make all-solid-state batteries safer and more powerful using inexpensive materials. Instead of adding costly metals, they redesigned the battery's internal structure to help lithium ions move faster. ...

Stanford researchers have developed an AI that can predict future disease risk using data from just one night of sleep. The system analyzes detailed physiological signals, looking for hidden patterns across the brain, heart, and breathing. It ...

A team of physicists has discovered a surprisingly simple way to build nuclear clocks using tiny amounts of rare thorium. By electroplating thorium onto steel, they achieved the same results as years of work with delicate crystals -- but far more ...

Using NASA's IXPE, astronomers captured an unprecedented view of a white dwarf star actively feeding on material from a companion. The data revealed giant columns of ultra-hot gas shaped by the star's magnetic field and glowing in intense X-rays. ...

Nearly everything in the universe is made of mysterious dark matter and dark energy, yet we can't see either of them directly. Scientists are developing detectors so sensitive they can spot particle interactions that might occur once in years or even ...

Einstein's claim that the speed of light is constant has survived more than a century of scrutiny--but scientists are still daring to test it. Some theories of quantum gravity suggest light might behave slightly differently at extreme energies. By .. ...

When scientists repeatedly drove a strongly interacting quantum system with laser "kicks," they expected it to heat up and grow chaotic. Instead, the atoms abruptly stopped absorbing energy and locked into a stable pattern of motion. This strange ...

Scientists have detected a surprisingly hot galaxy cluster dating back to the universe's infancy. The cluster formed far earlier and burned far hotter than current models predict. Researchers believe supermassive black holes may have rapidly heated . ...

Europa's buried ocean has made it one of the most exciting places to search for life beyond Earth. However, new calculations suggest its seafloor may be calm, cold, and largely inactive, with little energy to support living organisms. Unlike Jupiter ...