<![CDATA[The biggest history news stories of the last seven days.
Volcanoes and a Roman Climate Crisis
Volcanic eruptions in the Roman period led to climate anomalies affecting the whole northern hemisphere, according to new research.
The years 536 CE and 541 – 544 CE experienced a reduction in natural light which would have made human survival much more difficult, the researchers from the Chronology Laboratory of the Finnish Museum of Natural History and Natural Resources Institute Finland (Luke) claim.
Farming and animal husbandry would have been adversely affected by the reduction in sunlight, while humans would have been more prone to disease due to a lack of vitamin D.
“Our research shows that the climate anomaly, which covered all of the northern hemisphere, was the compound result of several volcanic eruptions,” says Markku Oinonen, director of the Chronology Laboratory.
Published in the Journal Scientific Reports, the new research is based on dendrochronology, also known as tree ring dating. The researchers analysed the variation in carbon isotopes in the annual growth rings of trees. The isotopes reflect the photosynthesis of the trees, which is largely dependent on the amount of solar radiation available in summer.
“Researchers have put together an annual growth ring calendar of treeline pine spanning more than 7,600 years. Various historical events can be contrasted with the calendar. The growth ring calendar is an important indicator of global climate change,” says researcher Samuli Helama from Luke.
Significantly, the years of unusually poor sunlight coincided with bubonic plague epidemic that ravished the Roman Empire. Starting in 542CE, the plague is believed to have killed around 50% of the inhabitants of the Eastern Roman Empire.
From its beginnings, the devastating plague spread in western Europe and as far north as Finland, killing millions.
Sulawesi Younger than Thought
The unique island of Sulawesi is not as old as typically thought, new research is claiming.
Located in the interface between Eurasia and Australasia, Sulawesi is home to myriad unique flora and fauna, such as the ‘deer-pig’ (Sulawesi Babirusa), ‘warty pig’ and the ‘miniature buffalo.’
Researchers from Oxford University’s Department of Archaeology and Queen Mary University of London used a combination of morphological and genetic data, alongside geological reconstructions of the island to gain a better understanding of the origins of the island’s fauna. Based on over a thousand samples, the scientists claim it is the largest ever genetic study of the island’s species.
It was found that each species most likely arrived on what is now Sulawesi at different times over the past 13 million years, but all of them began to spread across the island simultaneously about 1-2 million years ago. According to the study, this coincides with geological evidence for the emergence of the arms of the island from the ocean.
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