The first-ever photographed black hole emits an extraordinary gamma-ray flare, billions of times more energetic than visible ...

From mysterious dark matter to the radioactive decay of atomic nuclei, the past 12 months have reiterated just how strange ...

Scientists theorize there could be subatomic particles we have yet to discover. Here are five of the weirdest, rarest ...

Physicist John Wheeler was part of much of this Earth-shattering work, such as understanding the structure of the atom, ...

Scientists are exploring the possibilities of antimatter propulsion as they try to achieve interstellar travel. While ...

Antimatter was initially discovered in 1932 when physicist Carl David Anderson observed positrons—the antimatter form of an electron—in cosmic rays by passing them through a cloud chamber. He won the ...

The second suitable reaction involves the interaction of positrons with electrons. Positrons are the antimatter equivalents of electrons. Similar to antiproton-nucleon annihilation, positron ...

Supernova remnants, pulsars, and active galactic nuclei are known to emit charged particles and gamma rays with energy levels ...

Most cosmic rays are protons, some are heavier nuclei, and a small number (orders of magnitude fewer than protons) are electrons and their antiparticles (positrons). “Because the electron’s mass is ...

Harnessing this energy could make voyages to the outer reaches of the Solar System — or even to neighboring stars — feasible ...