Fun Stuff


Optical Illusions and Tricks:

C. elegans Illusion

Look at the following C. elegans oocyte:

The nucleus (arrow) appears convex ( to some people it appears concave).

Now with a little "magic"-- look at the same oocyte:

The nucleus now appears concave (to some it appears convex)

The lighting of an object can influence how we perceive 3 Dimensions. I just rotated the picture 180 degrees.

This optical illusion was inspired by a paper by:   James McCarter et al. (1999) Developmental Biology 205, 111–128 (1999): On the Control of Oocyte Meiotic Maturation and Ovulation in Caenorhabditis elegans.  The picture is a panel from Figure 3.  I had the hardest time visualizing the oocyte's nucleus as being concave it appeared convex (like smarties). Having said that, now I only see it concave...



C. elegans doing a magic trick!


We don't always see what we think:

If your eyes follow the movement of the rotating pink Vab-1 larva and embryo, you will only see one color, pink. 
If you stare at the black + in the center, the moving embryo/larva turns to green. 
Now, concentrate on the black + in the center of the picture. After a short period of time, 
all the pink embryo/larva will slowly disappear, and you will only see a green embryo/larva rotating.
There really is no green embryo/larva and the pink ones really don't disappear. 
This C. elegans illusion is derived from the Lilac chaser illusion.



A mutant worm with "eyes"


No- they are just blisters in the head region, but it looks bizarre...

Just like our lab fish "Google"

A Creepy Illusion:

Please wait a moment until the spiral has finished loading.
When it's spinning smoothly, stare at the center of the spiral
for about a minute. Then look at the back of your hand...
It will appear to be twitching and moving, as though
bugs were crawling under your skin!


 Do the experiment to prove this Illusion

Believe it or not but the squares marked A and B are the same shade of gray. If you don't believe they are the same, print out the picture and cut out each square and put them side by side and you will see that they are in fact the same.

Reference: Science. 1993 Dec 24;262(5142):2042-4

Make Your Own Illusion

This is a very cool optical illusion.  A cut-out figure of a dragon will appear to turn its head and follow you around the room.  Download the file and follow the instructions on how to make this illusion.


Click here to Download

 Hint: When making this dragon, the head must be in a concave configuration.


Another Optical Illusion:

Take a look at the following picture. It  is NOT animated. Your eyes are making it move. To test this, stare at one spot for a couple seconds and everything will stop moving. Or look at the black center of each circle and it will stop moving. But move your eyes to the next black center and the previous will move after you take your eyes away from it.