'I didn't believe it': Florida divers recover $100K silver bar from legendary shipwreck ...

The artifact spent more than 400 years underwater after a legendary Spanish galleon sank in a hurricane in 1622.
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Alzheimer's blood test matches brain scan in symptom-free adults, JAMA study shows

Alzheimer's blood test p-tau217 predicts 78% cognitive decline risk within ten years in symptom-free older adults, a JAMA ...