Diatoms explain release of CO2

(Phys.org) —Scientists have found unexpectedly high concentrations of opal, a mineral containing silicate, in marine sediments during the transition periods from ice ages to warm phases. The explanation as to what caused ...

S. Africa issues shark warning around washed-up whale

South African coastal authorities on Friday warned beachgoers around the tourist town of Knysna that sharks were moving into the area, feeding on the remains of a whale that ran ashore two days ago.

Killer whales migrate, study finds, but why?

Some killer whales, a study published Wednesday shows for the first time, wander nearly 10,000 kilometres (6,200 miles) from Antarctica's Southern Ocean into tropical waters -- but not to feed or breed.

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