What goes on under the ground during an earthquake? Use a Slinky to model the various seismic waves that make the earth tremble.
A downloadable series of graphics from our Faultline website gives a snapshot of seismic science.
A volte le cose non sono come sembrano.
Read stories and see footage from the 1989 Loma Prieta earthquake.
Los movimientos del ojo hacen parecer que el dise�o brilla.
Your CRT screen may appear to wiggle when you give it the raspberry, but the only thing wiggling is you.
What's a droodle? It's a riddle and a doodle all rolled up into one.
Can you recognize an ordinary penny? It may be tougher than you think!
Just how do we remember a face?
La famosa modelo de Leonardo es usada en un interesante experimento de percepci�_n.
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