There are many ways of seeing. As humans, we're used to seeing at a certain spectrum of light, at certain conditions of light and dark, and for certain distances. We also have some depth perception. In the animal world, things are more varied. Some animals can see in other spectrums than we cannot, including body heat of other animals. Some of them have multiple eyes (insects and spiders for example), and some have almost no sight at all. Some eyes were made to open underwater as well as above (alligators). Due to this difference in sight, animal eyes also come in a variety of shapes and colors. Can you identify these animals purely by their eyes? Then take our animal eye test and see if you've got a zoologist in you just waiting for their mettle to be tested.
Science Quiz: Think You Can Beat 15 Questions?
This test was passed by most 8th grade science students - can you do the same and answer all 15 questions?
Test Your Biological Knowledge By Beating This Quiz!
20 questions on basic biology will be enough to see how much biological knowledge you still carry around.
Quiz: What Kind of Dog Do You Have?
Take this quiz and find out what kind of personality your canine companion has.
Challenge: Can You Pass This Hit-the-Dot Test?
This visual test isn't only fun, but it also stimulates your eye muscles and exercises the visual part of your brain at the same time.
QUIZ: Can You Beat This Biology Test From 1994?
Can you get more than 10 in this 1994 biology exam?
QUIZ: What Do You Know About the Animal Kingdom?
Do you love animals and love to know about them? This trivia quiz will test your knowledge while also adding to it.
Can Spot the Difference in These Brain-teasers?
Are you good at brain-teasers? If you think so, then you should really take on these 8 awesome brain-teasing images by Gergely Dudás.
Can You Solve These 16 Perplexing Riddles?
There's no better brain workout that trying your hand at a few riddles.
Can You Guess These Ancient Riddles?
Can you solve these riddles thousands of years old?
Have a Go at Solving These Tricky Murder Riddles
Halloween is just around the corner, so to get you in the mood, we've given you 11 murder riddles to solve. Do you think you have what it takes? Find out now.
Can You Correctly See What's Hidden in These Images?
Can you see what's really hidden in these images? Click on each one to find the answer.
Challenge: Think You Can You Crack These 5 Math Riddles?
Test your math knowledge with these 5 fun math riddles.
Spot the Differences & Test Your Observational Skills!
Only the most observant of people can find all the differences between these images. Are you one of that select band of clever clogs?
Quick Test: Choose an Eye and Discover More About Yourself
The eyes are a window to the soul - choose yours and see what it says about you.
Challenge! Can You Solve These 7 Tricky Riddles?
These riddles will challenge your mental sharpness and will definitely keep you on your toes.
Are You Part of the 5% Who Can Solve These Logic Puzzles?
These puzzles will tease your brain like never before. If you manage to solve them, you'll be in an elite group - only 5% of people are capable of doing so.
Can You Solve These 8 "Mind Blowing" Riddles?
These riddles will show you that brain-teasing isn't just for kids. Do you have what it takes to solve these 8? Give them a go to find out!
How Many of These Clever Riddles Can You Answer?
How many of these riddles can you guess?
Can You Count All the Tigers Hiding in This Photo?
It might look like there are but 4 tigers in this image, but there are a lot more. How many can you find? Click on the image to see how many there are.
You Don't Genius to Solve This, But it Surely Helps!
This isn't just another easy test - can you crack it?
What You See In These Images Will Tell You About Yourself
Many personality tests rely on your choices to determine your personality, but this optical illusion test will work entirely on your subconscious...
Challenge: Can You Find the 6 Hidden Words in this Drawing?
Hidden in the image are six words that have been concealed. Only about 33% of adults will be able to find them all, making it one tough puzzle to complete.
Challenge: Can You Solve the 4 Square Riddle?
To solve this riddle, you must forget what you think you know...
PUZZLE: Can You Find all the Hidden Words in the Picture?
Picture puzzle with six hidden words
Challenge: Can You Crack These 10 Riddles?
Can you crack these 10 challenging riddles?
Test Your Mental Sharpness With These Brainteasers
See if you can figure out all of these brainteasers without peeking at the answers.
Massive Riddle Collection: 120 Tricky Riddles to Test You!
Here is our enormous collection of 120 tricky riddles with answers that will definitely make you put your thinking cap on!
10 Fun Visual Brain Teasers You Will Want To Share
Brains need exercise just as much as muscles do. Challenge yourself with these 10 fun observation tests.
Challenge: Think You Can Crack These 10 Riddles?
These challenging riddles ask one simple question: Are you a riddler?
Only a Few People Can See What's Hiding in This Image
What hides behind this red circle? Only a few can tell...
Riddle Me This: Test Your Logic by Solving Riddles!
These tricky riddles are not only fun but also will test your brain - give them a go, and see if you can solve them all!
Challenge: Are You Clever Enough For This Riddle?
A simple riddle that will drive you crazy!
These Riddles Have Simple Answers, But Can You Find Them?
These riddles all have very simple answers, but may not be as easy to solve as they appear.
10 Challenging Riddles to Test Your Thinking Skills
These brain-teasing riddles will definitely test your lateral thinking skills. So, get those cogs working and try to answer all 10!
Are You One of the 3% Who Can Really See This Image?
Can you see this image? Are you one of the lucky few?
These 8 Fun Riddles Will Test You to the Max!
Do you think you're a riddle brainbox? If so, give these 8 tricky riddles a try!
This Riddle Proved Too Hard For Me, Can YOU Solve It?
Are you clever enough for this riddle?
Challenge: Can You Spot the Hiding Animal?
Sometimes, when we're not all that attentive, we can easily miss the wonderful things hidden in nature. Find out if you can spot the animals in the pictures.
Is Your Mind as Sharp as a Knife? Try These Brain Teasers!
These addictive brain teasers will really get the cogs in your head turning!
Can You Solve These Tricky Little Riddles?
While some of us are good at solving riddles, others are just not. How do you do? Here are 9 tricky little riddles to put your brains to the test.
Challenge: Can You Solve These 10 Tricky Riddles?
These ten challenging riddles will leave you scratching your head.
Can You Solve These 10 Tricky Riddles? Give It a Go!
If you love to test yourself with challenging riddles, then give these 10 a go!
12 Mysterious Riddles That'll Boost Your Mental Capacity
These 12 great riddles will definitely get your brain cells flexing and strutting their stuff in no time at all. Come on, give them a go!
Can You Solve These Fun Brainteasers?
Brainteasers are a great way to dust off your critical thinking skills. Here are 10 logic brainteasers that will either stump or stun you!