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Student: "Liquids can't break. They're liquids."
Me: "A scientist at Drexel just broke one. It made a noise so loud she thought the machine exploded."
Student: "...what."
Yeah. Same.
The Discovery That Messes With States of Matter
Here's what happened: Researchers at Drexel University were stretching a viscous liquid — a tar-like hydrocarbon blend — and pulling it apart with increasing force. At some point, instead of thinning out and flowing like a liquid should... it snapped. Audibly. Like snapping a piece of hard candy.
Lead researcher Thamires Lima said the fracture noise startled her so badly she thought the equipment had broken. It hadn't. The liquid broke.
The study, published in Physical Review Letters in March, found that when you stretch a simple liquid fast enough that it can't flow away from the stress, it reaches a critical point — about 2 megapascals — and fractures like a solid. The team tested a completely different liquid with the same viscosity and got the same breaking point. That means this isn't a fluke of one weird substance. It appears to be a property of viscosity itself.
Here's the part that matters for your classroom: we teach states of matter as clean categories. Solids break. Liquids flow. But this research shows that the boundary between "solid behavior" and "liquid behavior" isn't a wall — it's a dial. Turn up the force fast enough and a liquid acts like a solid.
This Week
Write this on the board: "Can a liquid break?" Let them argue for 3 minutes. Then show them the Drexel research. Watch what happens to their confidence about states of matter being simple.
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New Resources (We Need Your Opinion)
We’ve been building new classroom resources. Three new activity formats, actually — and we want your opinion on them before we launch.
We built Would You Rather physics debates, Ranking Tasks, and Misconception Probes — all with full teacher guides, answer keys, and facilitation tips. They cover electrostatics, forces, momentum, gravity, energy, circuits, waves, and kinematics.
To say thanks for being here, here's a free one:
Six scenarios. Lightning safety, charging conductors vs. insulators, Coulomb's Law force comparisons — all structured as debates your students can argue about with zero prep from you. Hand it out and let them fight about physics. Teacher guide has full answer keys and misconception analysis.
Smart starts here.
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Now here's what we need from you:
Which Format Would You Use the Most?
Vote above and tell us. Seriously — your answer shapes what we build next.
Your Weekly Physics Joke
A physicist walks into a bar and orders a glass of water.
The bartender slides it over.
The physicist stares at it suspiciously.
"How do I know you won't snap on me?"
Stay Wildly Curious,
— Lauren & Shawn
P.S. If you teach electrostatics, that freebie pairs perfectly with the Drexel discovery. Charges, forces, conductors, lightning — it's all in there. Enjoy.
