How are dark matter and antimatter different?
Dipangkar Dutta, Professor of Nuclear Physics, Mississippi State University
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What is dark matter and what is antimatter? Are they the same or different? – Namrata, age 13, Ghaziabad, India
Imagine an epic video game with your favorite hero as a character. Another character is a mirror-image twin who shows up occasionally, exploding everything they touch. And, to add an extra level of difficulty, the game includes a...