Altamura Man yields oldest Neanderthal DNA sample

(Phys.org)—A team of researchers working in Italy has confirmed that Altamura Man was a Neanderthal and dating of pieces of calcite which were on the remains has revealed that the bones are 128,000 to 187,000 years old. ...

Researchers: We may have found a fabled sunstone (Update)

A rough, whitish block recovered from an Elizabethan shipwreck may be a sunstone, the fabled crystal believed by some to have helped Vikings and other medieval seafarers navigate the high seas, researchers say.

Sea urchin's spiny, elastic strength revealed

(Phys.org)—For the first time, a team of Australian engineers has modelled the microscopic mechanics of a sea urchin's spine, gaining insight into how these unusual creatures withstand impacts in their aquatic environment.

X-rays reveal why sea urchins are no easy prey

(PhysOrg.com) -- The spine of a sea urchin is 99.9% chalk, a very common material forming tiny crystals that are very hard but easy to break apart. Scientists have now discovered how these marine animals use chalk or lime ...

Viking 'sunstone' more than a myth

Ancient tales of Norse mariners using mysterious sunstones to navigate the ocean when clouds obscured the Sun and stars are more than just legend, according to a study published Wednesday.

Crystal clear research

(PhysOrg.com) -- Scientists have successfully created synthetic crystals whose structures and properties mimic those of naturally occurring biominerals such as seashells.

How soft corals defy their environment

Many marine organisms, including corals, build skeletons from calcium carbonate -- in the form of calcite or aragonite. The current composition of seawater favors the formation of aragonite -- but soft corals have a specific ...

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