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Understanding femoral geometry is central to orthopedic surgery
and anyone who has read Mario Livio's book on φ
ecologists
Special relativity removed the distinction
trilobite necklace | silver chain Understanding femoral geometry is centralTrilobite necklace sterling silver Trilobites owned the oceans for 270 million years. From the Cambrian explosion (~521 Ma) until the Permian extinction (252 Ma), these three lobed arthropods diversified into 20,000 species and left fossils on every continent. Their compound eyes were calcite crystal lenses, the only biological mineral optics known. The Anatomy of the Trilobite Trilobites were marine arthropods with three distinct body lobes: a
