Scientifically | Science

"One of the most charming encounters you can make underwater: a swarm of juvenile Striped Eel Catfish. The dynamic of these schools is enchanting, and I will never get bored watching them rolling over the sandy sea floor. In their early life they tend to form these vivid balls for reasons of protection but also to feed together. Fish in the front will move down to the sand and grab some quick bites while the remaining school is flying over them. When finished, every single fish has to get in the line again and the show starts from the beginning. Wait, roll, eat, repeat! ☝🏾😁" 🐠 Plotosus lineatus (juvenile) 📍 Amed, Bali 🇮🇩 National Geographic

The smoke is like water. The surface and glass are cold, which directs the smoke in a straight line to the bottom.

Moire kinetic wheel

Homemade mini electric motor at home. It consists of improvised materials that everyone can find at home: pins, batteries and a magnet with wire.

The "balancing" experiment. If you leave about a third of the liquid in an aluminum jar, the jar can be balanced at a 45 degree angle.

Diffraction Spectrum Candle. A thin plastic diffraction grating surrounds the flame in this rainbow design. The rainbow spectrum is not created by refraction, as with a prism, but by diffraction, where light waves deconstructively and constructively interfere.

Orbiforms are figures with a constant-width curve or Reuleau polygons. These aesthetically pleasing metal shapes seem angular. But if you put any flat, level surface on top and start moving it, it will move parallel to the surface of the table.

✨ COMB JELLIES ✨ Comb jellies look in many ways like true jellyfish, but are actually distant cousins! They are from the phylum ctenophore and don’t have the stinging cells (nematocysts) that jellyfish do! Comb jellies also generally have their mouths facing forward as they move through the water while jellyfish have them trailing! Comb jellies also move by using cilia which are lines along their bodies, and act like oars while jellyfish move by pulsing their bodies! National Geographic

High voltage and hydrogen.

Under the force of gravity, the raisin descends to the bottom. Then gas bubbles form on the rough surface of the raisin. When there are enough bubbles, the expulsive force (Archimedes' principle) will cause the raisin to rise to the surface of the carbonated water. At the surface, the gas bubbles burst, and gravity causes the raisin to sink back down again.