Richard Dixon Oldham was a Britishgeologist who, in 1906, argued that the Earth must have a molten interior as S waves were not able to travel through liquids nor through the Earth's interior.
... Barents, (1550?-1597), Dutch, died on Nova Zembla seeking the Northeast Passage[?]
Abu Abdullah Muhammad Ibn Battuta, (1304?-1377?), Moroccan Muslim, visited Mecca ...