I made this abstract video in Adobe Premiere that shows giant clams’ point of view. Giant clams have a few hundred eyes about the size of pinholes all along the edge of their bodies. Their eyes are shaped like a cup and have very narrow openings, but they do not have a lens. Giant clams are sensitive to three different colours of light that are blue, green and magenta. However, they can’t combine the information. Therefore, they see colourful but undefined images.
(There are some working process screenshots.)
I made this video that imitate how snakes hear. I also tried to imitate their point of view by moving my gopro camera. ( But I don’t have a thermal camera, I couldn’t imitate the real effect of snakes’ point of view.) Snakes have no visible ear, so they don’t hear sounds as we do. But it’s not quite right to say that snakes are deaf. They have vestiges of the apparatus for hearing inside their heads, and that setup is attached to their jaw bones, so they feel vibrations very well and may hear low-frequency airborne sounds. Therefore, I mute the sound when the camera risen that represents like a snake looks up around, and play the sound on when the camera moves on the ground that represents a snakes’ move.
(There is an image of my working process.)
I am interested at doing an activity that imitate how fish eat food. We all may know how it works, but we never think about it. How do fish overcome the problem of getting hold of their prey? The solution for many fish is to vacuum up their food. By opening their mouths and expanding their buccal cavity, fish create an area of low pressure and water rushes in from outside to equalize this. If they manage to time it just right, their hapless prey is also impelled into their mouths. When the fish close their mouths, the food is trapped there when the excess water is pushed out of the gills. Fish, especially those that eat other fish, have extraordinarily large mouths, enabling them to produce a powerful suction current and to accommodate large prey items when they catch them. Therefore, for this activity, I want to prepare some slices of strawberries and put them into a cup of salt/briny water. Let the viewers try to drink the whole thing first, and spit the salt water out of their mouth as a fish then eat the strawberries. Although as human we don’t have gill as fish do, we can try to get an sense of what may feels like through this activity. I think that will be an interesting experience! In addition, here is another video that explains this concept visually.
Pictures of the activity in class:
Geckos are lizards belonging to the infraorder Gekkota, found in warm climates throughout the world. Many species are well known for their specialised toe pads that enable them to climb smooth and vertical surfaces, and even cross indoor ceilings with ease.
About 60% of gecko species have adhesive toe pads that allow them to adhere to most surfaces without the use of liquids or surface tension. Such pads have been gained and lost repeatedly over the course of gecko evolution. Adhesive toepads evolved independently in about 11 different gecko lineages and were lost in at least 9 lineages. The spatula-shaped setae arranged in lamellae on gecko footpads enable attractive van der Waals’ forces (the weakest of the weak chemical forces) between the β-keratin lamellae/setae/spatulae structures and the surface. These van der Waals interactions involve no fluids; in theory, a boot made of synthetic setae would adhere as easily to the surface of the International Space Station as it would to a living-room wall, although adhesion varies with humidity. A recent study has however shown that gecko adhesion is in fact mainly determined by electrostatic interaction (caused by contact electrification), not van der Waals or capillary forces. The setae on the feet of geckos are also self-cleaning and will usually remove any clogging dirt within a few steps. Teflon, which has very low surface energy, is more difficult for geckos to adhere to than many other surfaces. Gecko toes seem to be “double jointed”, but this is a misnomer and is properly called digital hyperextension. Gecko toes can hyperextend in the opposite direction from human fingers and toes. This allows them to overcome the van der Waals force by peeling their toes off surfaces from the tips inward. In essence, by this peeling action, the gecko separates spatula by spatula from the surface, so for each spatula separation, only some nN are necessary. (The process is similar to removing scotch tape from a surface. Geckos’ toes operate well below their full attractive capabilities most of the time, because the margin for error is great depending upon the surface roughness, and therefore the number of setae in contact with that surface.