"The prevailing belief about dark matter particles is that they should be about 100 or more times heavier than protons," Subir Sarkar tells PhysOrg.com. "However, we were thinking about the possibility of lighter particles that can constitute dark matter, which may be more easily detectable with current experiments."

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"I think this idea is profoundly wrong. Experiment will decide who is right. My idea is that dark matter is completely a virtual quantum effect inside the vacuum, no real particles of any kind can explain it." -- Jack Sarfatti