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The universe is expanding 9 percent more quickly than expected, telling us there’s something we’re missing. Could it be a new type of particle?
For thousands of years, we have thought we knew what the universe – and everything in it – was made of: normal matter, the kind that make up the elements of the periodic table.
Only about 5% of the universe consists of ordinary matter such as protons and electrons, with the rest being filled with mysterious substances known as dark matter and dark energy.
Dark matter is the most common stuff in the universe. Now, studies are beginning to shed some light on this mysterious substance.
Did dark matter kill the dinosaurs? Recent work by Harvard physicists may have us reevaluating the mysterious substance of dark matter, and how the dinosaurs became extinct.
The conventional understanding of gravity just doesn’t seem to fit with what we’re learning about the cosmos and physics, say some scientists.
