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Tag Physics

Dental delight! Tooth of sea urchin shows formation of biominerals

December 21, 2009

Some of the most common minerals in biology, including those in bones and shells, have a mysterious structure: Their crystals are positioned in the same orientation, making them behave as one giant crystal, even though they do not look like a faceted crystal.

Scientists hope to mimic nature’s dynamos

October 9, 2009

In the cosmos, all celestial objects - planets, stars, galaxies and clusters of galaxies - have magnetic fields. On Earth, the magnetic field of our home planet is most easily observed in a compass where the needle points north.

Curiosities: How big is space?

August 17, 2009

Space is probably infinite, but we can see only the part that contains stars or galaxies whose light has been able to reach us, says…