Quattro esperimenti, cos�� piccoli da stare su una cartolina.
A volte le cose non sono come sembrano.
Quando i tuoi occhi si stancano, vedi dei colori che in realt�� non esistono.
Riesci a contorcere la tua mano?
San Francisco was born in gold dust, and nearly died in rubble and ashes.
Read stories and see footage from the 1989 Loma Prieta earthquake.
The 1906 earthquake jolted geologists into focusing on how and why faults break loose.
See a map of recent earthquakes in the United States, and learn why earthquakes happen so frequently on the West Coast.
What's at fault?
The earth moves in mysterious ways
The three most densely populated cities on the planet where seismologists expect major earthquakes are San Francisco, Tokyo, and Istanbul. Find out why the effects in each city will be very different.
What happens to sandy or fine-grained soils when an earthquake shakes them up? Try this simple activity to find out.
In an earthquake, some older structures collapse and others stand tall. The difference is usually retrofitting.
How good is your friend's driving? You be the seismometer, and find out whether your pal is a smooth sailor or a mover and shaker.
Richter and beyond
We can't predict when an earthquake will occur, but we can avoid some potential disasters.