A pretty spectacular science experiment: how to make an Incredible Egg Geode.
Your egg geode is formed through a process called sedimentation. The heated alum solution contains suspended particles of alum powder and as the solution cools, these particles of alum begin settling. When the alum particles settle towards the bottom of the beaker or glass, they begin crystallizing. With the alum-covered egg at the bottom, the alum particles from the solution begin attaching themselves to the egg. Covering your egg in alum powder beforehand gives the suspended alum particles a surface to which they can more readily attach themselves. The particles that settle onto the surface of the egg crystallize, and you will also see crystallization on the bottom and sides of the beaker or glass.
With footage taken from the International Space Station, NASA fan Bruce W Berry Jr cleaned up and created this Time-Lapse | Earth homage. The location views are listed in order:
1. A Jump over the Terminator
2. Sarychev Volcano
3. From Turkey to Iran*
4. Hurricane Irene Hits the US
5. Indian Ocean to Pacific Ocean Through the Cupola*
6. Central Great Plains at Night*
7. Aurora Borealis over the North Atlantic Ocean*
8. Aurora Borealis from Central U.S.*
9. Up the East Coast of North America*
10. Myanmar to Malaysia*
11. Western Europe to Central India
12. Middle East to the South Pacific Ocean
13. Aurora Borealis over Europe*
14. City Lights over Middle East*
15. European City Lights*
16. Northwest coast of United States to Central South America at Night
17. Moonglow over Canada and Northern U.S.*
18. Stars from the Pacific Ocean (1)
19. Stars from the Pacific Ocean (2)
20. Stars from the Pacific Ocean (3)
21. Stars and the Milky Way over the Atlantic*
22. The Milky Way and Storms over Africa (1)
23. The Milky Way and Storms over Africa (2)
Footage Note: The slower video represents a closer resemblance to the true speed of the International Space Station; this footage was shot at one frame per second. Clips are all marked with an *.
There are more International Space Station videos in the archives, including a tour of ISS and what is perhaps our favorite time-lapse view: Further Up Yonder: A Message From ISS To All Humankind.
Robots have to be able to move, perhaps quickly, on all kinds of terrain — search and rescue missions on remote parts of Earth or explorations on other planets like Mars will require it. So terradynamic researchers at Georgia Tech are creating and testing robots that have different leg shapes, all inspired by animals, to handle movement in a variety of environments. Bonus technology: 3D printing.
Watch this robot with c-shaped legs running super fast on Mars-like sand, and read more about the experiments here or here.
In this Science on the SPOT: Preserving the Forest of the Sea, watch Kathy Ann Miller, PhD, curator of the University Herbarium at the University of California - Berkeley, as she shares the wide variety of seaweeds in the collection.
We love when someone gives a personalized video tour of their work, especially when it mixes nature, science and beautiful, art-like specimens all together. Kathy and her team are digitizing samples of 80,000 kinds of seaweed collected from the North American west coast, so that they can be shared online with researchers from around the globe. You can read more about the project here.
PS. Need a DNA primer? Watch this vid.