If dark matter has some way of interacting with itself, then dark matter particles could collide and turn into particles of normal matter, just as two normal matter particles can collide to create dark matter.
This is puzzling. The presumption here is that if you can make one thing out of two other things, then you can make this first thing out of these new other things. It may well be the case and the law on the particle level, however, in my experience you can't turn orange juice back into an orange.


“If you want people to be able to pay attention, don’t start with details. Start with the key ideas and, in a hierarchical fashion, form the details around these larger notions. Meaning before details.”
― Brain Rules: 12 Principles for Surviving and Thriving at Work, Home, and School
― Brain Rules: 12 Principles for Surviving and Thriving at Work, Home, and School

“The most valuable land in the world is the graveyard. In the graveyard are buried all of the unwritten novels, never-launched businesses, unreconciled relationships, and all of the other things that people thought, ‘I’ll get around to that tomorrow.’ One day, however, their tomorrows ran”
― Die Empty: Unleash Your Best Work Every Day
― Die Empty: Unleash Your Best Work Every Day

“The most valuable land in the world is the graveyard. In the graveyard are buried all of the unwritten novels, never-launched businesses, unreconciled relationships, and all of the other things that people thought, ‘I’ll get around to that tomorrow.’ One day, however, their tomorrows ran out.”
― Die Empty: Unleash Your Best Work Every Day
― Die Empty: Unleash Your Best Work Every Day
“The safest part of your journey is over. Now drive home safely. —ANONYMOUS PILOT”
― Numbers Rule Your World: The Hidden Influence of Probabilities and Statistics on Everything You Do
― Numbers Rule Your World: The Hidden Influence of Probabilities and Statistics on Everything You Do

“Regardless of who you are, the brain pays a great deal of attention to several questions: “Can I eat it? Will it eat me?” “Can I mate with it? Will it mate with me?” “Have I seen it before?”
― Brain Rules: 12 Principles for Surviving and Thriving at Work, Home, and School
― Brain Rules: 12 Principles for Surviving and Thriving at Work, Home, and School
Artem’s 2022 Year in Books
Take a look at Artem’s Year in Books. The good, the bad, the long, the short—it’s all here.
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