It's not just the moon that causes ocean tides.
A model for heart development
Gravity turns soap film into an ever-shifting, colorful masterpiece.
Have you ever wondered what makes blue cheese blue, or why some cheeses are hard and others soft?
Grow spikes of crystals in the sun.
These tricky pictures shift and change as you look at them.
Your brain is always looking for blank spaces and filling them in. Sometimes, your brain leaps to the wrong conclusion. Then you get a surprise!
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