Tech demo of setup able to levitate, control and maneuver small light objects in a 3D space using ultrasound waves, defying gravity.The essence of levitation technology is the countervailing of gravity. It is known that an ultrasound standing wave is capable of suspending small particles at its sound pressure nodes and, so far, this method has been used to levitate lightweight particles, small creatures, and water droplets. More Here
Many plants can’t create a seed, nut, berry, or fruit without the help of bees. Bee populations have been mysteriously declining, but we do have the power to revive bee colonies ourselves. Check out these 8 beekeeper challenges!
Use food dye to see how plants get the water and nutrients they need through tiny capillary tubes. Biologists often use this dying process to make their subject easier to see. Complete this challenge and get started on earning the Biologist skill!