"We call it dark matter, and for decades, the standard, simple assumption has been that it does exactly one thing: pull. That is, we have viewed dark matter as involving no pushing, no collisions, no chemistry—just gravity, acting in silence to hold together the cosmos."
"Three recent preprint papers that arrived within weeks of one another probe the possibility that dark matter is not a mute backdrop but an active participant in cosmic physics. Instead of just imparting a feeling through its gravitational pull, it may touch things via other interactions."
"None of these papers delivers a detection; we are very much still in the dark about dark matter. But together, they may redraw what we're actually looking for."
Dark matter, which outweighs visible matter by a factor of five, has traditionally been viewed as a passive gravitational force. Recent research suggests it may actively interact with ordinary matter, challenging the long-held assumption of its inertness. New studies indicate that dark matter's properties could vary by location and that it may have a broader range of interactions than previously thought. While no direct detection has been made, these findings could significantly alter the search for dark matter and our understanding of its role in the universe.
Read at www.scientificamerican.com
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