The Eyes Have It
Open your eyes and prepare to be dazzled at SandlotScience.com, home of the
wildest optical illusions you've ever seen. Swing by www.SandlotScience.com
to see strange illusions, camouflage, special effects and much more. Check
out the bizarre geometry of the Crazy Crate, or send your eyeballs into a
wild spin at the Rotating Spiral Illusion. Word lovers will enjoy the games
at the Typography section where you can play with some tough ambigrams. And
be sure to stop by the site's Ambiguous Illusions section, featuring 23
of these extraordinary visual gems, such as the Barber Pole Illusion and the
Vanishing Area Paradox. Sandlotscience.com is truly an eye-catcher of
a Web site. (Disclaimer: This site now contains advertisements.)
The Good Neighbor Policy
Some people travel the world to help poor people in other countries. Pretty inspiring, huh? But you don't have to travel far to make a big difference in your community. Catch the volunteering bug at the Kids Next Door site at www.hud.gov/kids. You'll meet kids who care, just like you, with great ideas for how to help others. One girl got a group together to make quilts for homeless people. A church group, a school or one kid can make a difference. Check out the Kids Volunteer! links to find out how you can get involved in your own neighborhood. You can help build a house, make some new friends and make the world a better place. Kids Next Door is a great place to start.
Journey through the past and discover the amazing evolution of time measurement. A Walk Through Time covers the major periods of this science, from ancient calendars to today's Internet time service. Travel to http://physics.nist.gov/GenInt/Time/time.html where time is always of the essence. You'll go back 20,000 years to ice-age Europe, when hunters marked the passage of the days with sticks and bones. The site also profiles the incredible calendars from the ancient Egyptians, Babylonians and Aztecs. Check out some of the earliest clocks known, from the Egyptian shadow clock to the water clocks of Greece. Then keep time with information ranging from sun dials to quartz clock operation to the "Atomic Age" of time standards, when precise time-keeping became the norm. Finally, learn about the World's Time Zones, which came into play in the 1800s because of railway travel. A Walk Through Time is your ultimate guide to the evolution of timekeeping.
1. Name one thing you can do to help the homeless.
Dear Amy: I need help with my chemistry. --John, Indianapolis
(This site is no longer available, but you can go to www.periodictable.com.)