2) Smart Keywords. If there’s a search you use a lot (let’s say IMDB.com’s people search), this is an awesome tool that not many people use. Right-click on the search box, select “Add a Keyword for this search”, give the keyword a name and an easy-to-type and easy-to-remember shortcut name (let’s say “actor”) and save it. Now, when you want to do an actor search, go to Firefox’s address bar, type “actor” and the name of the actor and press return. Instant search! You can do this with any search box.
3) Keyboard shortcuts. This is where you become a real Jedi. It just takes a little while to learn these, but once you do, your browsing will be super fast. Here are some of the most common (and my personal favs):
• Spacebar (page down)
• Shift-Spacebar (page up)
• Ctrl+F (find)
• Alt-N (find next)
• Ctrl+D (bookmark page)
• Ctrl+T (new tab)
• Ctrl+K (go to search box)
• Ctrl+L (go to address bar)
• Ctrl+= (increase text size)
• Ctrl+- (decrease text size)
• Ctrl-W (close tab)
• F5 (reload)
• Alt-Home (go to home page)
4) Auto-complete. This is another keyboard shortcut, but it’s not commonly known and very useful. Go to the address bar (Control-L) and type the name of the site without the “www” or the “.com”. Let’s say “google”. Then press Control-Enter, and it will automatically fill in the “www” and the “.com” and take you there - like magic! For .net addresses, press Shift-Enter, and for .org addresses, press Control-Shift-Enter.
5) Tab navigation. Instead of using the mouse to select different tabs that you have open, use the keyboard. Here are the shortcuts:
• Ctrl+Tab (rotate forward among tabs)
• Ctrl+Shft+Tab (rotate to the previous tab)
• Ctrl+1-9 (choose a number to jump to a specific tab)
People with normal color vision can perceive numbers formed by patterns of colored dots in every circle. If you do not see some of the numbers, you should have your eyes checked and consider working in a job where color discrimination is not critical.
Approximately 6%-8% of people of European descent, 4%-6% of people of Asian descent, and 2%-4% of people of African descent have some type of defective color vision. Images based on Tests for Colour Blindness by Dr. Shinobu Ishihara.
 25 |  29 |
 45 |  56 |
 6 |  8 |
As an experiment, look at these circles with blue-red 3D glasses, first with one eye, and then with the other. Some of the numbers will not be visible! Also, use the glasses to look at the word color test below and explain the results.
BLACK RED GREEN
PURPLE YELLOW RED
ORANGE GREEN BLACK
BLUE RED PURPLE
GREEN BLUE ORANGE
This is a type of psycholinguistic test that poses some difficulty because the portion of the brain that handles language has the conflicting tasks of verbalizing the color of the written words while ignoring the meaning of words representing colors.
Animals which blend with the color and texture of their environment are more likely to survive either as prey or as predators. Camouflaged prey have a greater chance of surviving by avoiding detection, whereas camouflaged predators can hunt more successfully if they can approach the prey without being seen.
The coloration of zebras makes them very conspicuous in the African plains, but the pattern of black and white stripes makes it very hard for predators to distinguish one individual in the middle of the herd. Do you see eight or nine zebras?
The circles appear to rotate when you move your head closer and further away from the screen while looking at the dot in the center. Our peripheral vision interprets the relative increase or decrease of the image in the retina as rotational motion of the slanted lines.
as our eyes shift to examine the picture.
but each square seems lighter on its left edge than on its right edge.
Can you find a relationship between this triangle and a Möbius strip?
( Hint: Assume that the thickness of the strip is the same as the width of the strip,
and that instead of twisting 180 degrees before joining, there is only a 90 degree twist. )
You can go from corner A to corner B by climbing the stairs or by going around a level plane.
