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Gravity as Space-Time Geometry
- Gravity bends the fabric of space-time creating dents that cause objects to fall together.
- This geometric view, from Einstein's relativity, explains gravity differently from other fundamental forces.
Universe Mostly Dark Matter and Energy
- Ordinary matter makes up only about 5% of the universe's content.
- Dark matter and dark energy compose the vast majority, dominating structure and cosmic expansion.
Katie's Nerve-Wracking Hawking Seminar
- Katie Mack recounted nervously giving a seminar with Stephen Hawking unexpectedly attending.
- Hawking's speech device picked random words, making his interjections confusing and unrelated to her talk.