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🕳️ The Human Black Hole

If you compressed every single human on Earth into a black hole, the resulting event horizon would be smaller than a single particle of dust. 🕳️

#blackhole #physics #astronomy #einstein #science
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Daily Brain & Mind — Day 13 (Optical Illusion)

🧠 The Hollow-Face Illusion (Concave Einstein)

Walk around or rotate this 3D mask that is hollow on the back. Why does the concave hollow inside still appear to pop outward as a normal face?

💬 Even when you know it's hollow, can your brain see it as hollow? Tell us in the comments! (Solution in first comment 👇)

#brain #hollowface #einstein #neuroscience #illusion
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