1. Dilatants - fluids that get more solid when stressed.Meer hierover (o.a. video's):
2. Auxetic materials - materials that get thicker when stretched.
3. Superfluids - liquids that flow without friction.
4. Ferrofluids - magnetic fluids that can look spectacular.
5. Dry ice. Carbon dioxide freezes at -78.5 °C and it's fun and versatile stuff.
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