"WIMPs are still the leading candidate for dark matter, but billions of dollars of experiments have been done, only getting stronger and stronger upper limits, so alternative scenarios have to be considered."

Is dark matter made of mysterious 'ghost particles?' Galaxy clusters could hold the answer

Source: space
Source Link: https://www.space.com/astronomy/dark-universe/is-dark-matter-made-of-mysterious-ghost-particles-galaxy-clusters-could-hold-the-answer