"Slow" marine animals show their secret life under high magnification. Corals and sponges are very mobile creatures, but their motion is only detectable at different time scales compared to ours and requires time lapses to be seen. These animals build coral reefs and play crucial roles in the biosphere, yet we know almost nothing about their daily lives.Watch the Video
The bending of a light ray depends only on the angle it hits the lens, and not on the thickness of the glass. This means thick lenses can be made thinner, as shown here. This is called a Fresnel lens, and is used to make magnifying sheets as well as in lighthouses. [more] [video] [code]
Super awesome simple gif to explain fresnel lenses
one of the coolest dudes I’ve met while on the road just got back from his 15-month adventure around the world and posted this video. honored to say I’ve thrown Holi colors, eaten 10-cent sandwiches, and scaled Himalaya trails with this guy.
prepare for severe wanderlust.
“prepare for severe wanderlust” …got that right.