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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.