There are Parasites in your Brain...

Added: 2026-05-25

[00:00:00]There is a one [music] in three chance that a parasite is living inside your brain right now and you probably don't even know it. Meet Toxoplasma [music] gondii, a microscopic parasite that according to studies has already infected roughly 1/3 of all humans on Earth. Most people carry it their entire lives [music] with zero symptoms. It sits dormant forming cysts directly inside your brain tissue.

[00:00:24]Here's where it gets disturbing though.

[00:00:25]In rats, Toxoplasma doesn't just [music] hide. It rewires their brain. Rats that are naturally terrified of cats suddenly become attracted to the smell of cat urine [music] walking directly towards their own predator. The parasite itself needs cats [music] to reproduce so it engineers the rat's death to complete its own life cycle.

[00:00:45]The question scientists are still debating is is it doing something similar to [music] us?

[00:00:50]Some studies have linked latent Toxoplasma infection in humans to increased risk-taking behavior. [music] And one study found infected individuals had a 2.65 times higher risk of being involved in traffic accidents. The parasite gets into [music] us primarily through undercooked meat or contact with infected cat litter. 1/3 of the people watching this [music] video right now may be infected and unfortunately, there is no cure.