Pre-contact Central and South American dogs (Canis familiaris) — all dogs preceding contact with European settlers — descended from a single maternal lineage that diverged after dogs entered North ...

NGC 253 is located approximately 11.5 million light-years away in the constellation of Sculptor. Otherwise known as the Silver Coin, Silver Dollar Galaxy or Sculptor Galaxy, the galaxy was discovered ...

“Proton emission is a rare form of radioactive decay, in which the nucleus emits a proton to take a step towards stability,” said Henna Kokkonen, a doctoral researcher at the University of Jyväskylä. ...

For decades, scientists have known that at least half of the Universe’s ordinary, or baryonic matter — composed primarily of protons — was unaccounted for. Previously, astronomers have used techniques ...