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" ... According to models and simulations, all galaxies should be embedded in dark matter halos, whose ... [+] densities peak at the galactic centers, but whose effects are more easily seen far from the galactic disk, which is dominated by normal (baryonic) matter. A direct measure of the galactic potential can be obtained through the measurement of the periods and period changes of binary pulsar systems. ... "
" ... According to models and simulations, all galaxies should be embedded in dark matter halos, whose... [+] densities peak at the galactic centers. However, unless the dark matter obeys very particular models and exhibits specific properties, it will be difficult to account for a gamma ray or positron excess with dark matter. ... "
" ... In this scenario, you get mini-halos inside regular halos inside giant halos, all connected by filaments that themselves, given enough time and the right properties, will produce their own halos as well, while an even grander web forms on larger scales. ... "
" ... Only with the presence of massive dark matter halos, surrounding galaxies and driving the growth of the cosmic web, can a planet like Earth or carbon-based life like we find terrestrially be formed. As we've come to understand what makes up our Universe and how it grew to be this way, one inescapable conclusion emerges: dark matter is fundamentally necessary for life to arise. Without it, the chemistry that underlies all life could never have occurred. Today and every day, we should be thankful for every part of the cosmic story that allowed us to exist. Even dark matter. ... "
" ... The researchers concluded that these halos were indeed traces of soft-shelled dinosaur eggs, suggesting that the first dinosaurs laid eggs with soft shells. ... "