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  2. Baryogenesis - Wikipedia

    en.wikipedia.org/wiki/Baryogenesis

    In physical cosmology, baryogenesis (also known as baryosynthesis [1] [2]) is the physical process that is hypothesized to have taken place during the early universe to produce baryonic asymmetry, i.e. the imbalance of matter and antimatter (antibaryons) in the observed universe.

  3. Flatness problem - Wikipedia

    en.wikipedia.org/wiki/Flatness_problem

    The spacetime of the universe is, unlike the diagrams, four-dimensional. The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special ...

  4. Here’s why the universe has more matter than antimatter - AOL

    www.aol.com/why-universe-more-matter-antimatter...

    All the particles that make up the matter around us, such electrons and protons, have antimatter versions which are nearly identical, but with mirrored properties such as the opposite electric charge.

  5. Baryon asymmetry - Wikipedia

    en.wikipedia.org/wiki/Baryon_asymmetry

    In physical cosmology, the baryon asymmetry problem, also known as the matter asymmetry problem or the matter–antimatter asymmetry problem, [1] [2] is the observed imbalance in baryonic matter (the type of matter experienced in everyday life) and antibaryonic matter in the observable universe.

  6. Here’s why the universe has more matter than antimatter - AOL

    www.aol.com/news/why-universe-more-matter...

    When an antimatter and a matter particle meet, they annihilate in a flash of energy. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 ...

  7. Proton decay - Wikipedia

    en.wikipedia.org/wiki/Proton_decay

    The universe, as a whole, seems to have a nonzero positive baryon number density – that is, there is more matter than antimatter. Since it is assumed in cosmology that the particles we see were created using the same physics we measure today, it would normally be expected that the overall baryon number should be zero, as matter and antimatter ...

  8. Universe - Wikipedia

    en.wikipedia.org/wiki/Universe

    The portion of the universe that we can see is approximately 93 billion light-years in diameter at present, but the total size of the universe is not known. [3] Some of the earliest cosmological models of the universe were developed by ancient Greek and Indian philosophers and were geocentric, placing Earth at the center.

  9. Right again, Einstein! Study shows how antimatter ... - AOL

    www.aol.com/news/again-einstein-study-shows...

    There appears to be very little antimatter - and on Earth almost none. What's more, matter and antimatter are incompatible. If they touch, they blow up, a phenomenon called annihilation.