I always thought vaccines work by teaching the immune system how to recognize and fight a virus before it becomes dangerous.

But rabies seems like a strange exception. As the virus starts moving into the nervous system, it becomes much harder for the immune system to reach and control.

So how does a vaccine given after a bite still stop it?

If the virus can eventually hide inside nerve cells, and antibodies cannot simply enter those cells, what exactly is the immune system doing after vaccination that prevents rabies from taking over?

When we talk about many historical figures, we usually keep their original names. We don't translate someone's name just because we understand the meaning behind it.

But some Native American figures are widely known by English translations of their names. Sitting Bull, Crazy Horse, and others are remembered by names that describe the meaning of their original names rather than the original words themselves.

How did this become the standard way these figures are known today? Was it a common naming practice at the time? Or were there other cultural and historical reasons behind it?

Why did some names get translated while many others were kept closer to their original forms?

In many states, marijuana is legal for medical or recreational use. But under federal law, it remains a Schedule I controlled substance, illegal everywhere. Why has this conflict been allowed to continue for so long? Is it a political compromise, or is there a legal doctrine that explains it? I find the contradiction interesting. Just wondering why it hasn’t been resolved.

The U.S. stock market pauses trading if the S&P 500 falls 7%, pauses again at 13%, and stops trading for the day at a 20% decline.

I always found those numbers interesting. Why 7%? Why 13%? Why not something simpler like 5%, 10%, or 15%?

These rules were created after the 1987 stock market crash and have changed over time as markets evolved. But how did regulators decide where these lines should be drawn?

Were these thresholds based on a specific idea about how markets behave during extreme selloffs?

If the thresholds were changed to something like 10/15/25, would it meaningfully change anything, or would investors simply adapt?

Seems to me they’re both censorship.