Post-Roman Europe: The barbarian kingdoms

The barbarian states which arose on the ruins of the Western Empire were founded under widely different circumstances of time and place, by tribes and federations of tribes drawn from every part of Germany. We expect to find, and we do find, infinite varieties of detail in their laws, their social distinctions, their methods of government. But from a broader point of view they may be grouped in two classes, not according to affinities of race, but according to their relations with the social order which they had invaded. Continue reading “Post-Roman Europe: The barbarian kingdoms”

Genetic data on half a million Brits reveal ongoing evolution and Neanderthal legacy

Neanderthals are still among us, Janet Kelso realized 8 years ago. She had helped make the momentous discovery that Neanderthals repeatedly mated with the ancestors of modern humans—a finding that implies people outside of Africa still carry Neanderthal DNA today. Ever since then, Kelso has wondered exactly what modern humans got from those prehistoric liaisons—beyond babies. How do traces of the Neanderthal within shape the appearance, health, or personalities of living people? Continue reading “Genetic data on half a million Brits reveal ongoing evolution and Neanderthal legacy”

Split and continuous sleep in teens impact cognition and glucose levels differently

Many adolescent students sleep less than the recommended duration of 8-10 hours a night. It is unclear; however, whether short night sleep combined with an afternoon nap is as good as having the same amount of sleep continuously during the night without a nap. Researchers at Duke-NUS Medical School have demonstrated for the first time that different sleep schedules with the same total sleep opportunity over 24 hours may have dissimilar effects on cognition and glucose levels. This is the first study to gather experimental evidence on the notion that ‘what may be appropriate sleep for one health goal may not be for another’. Continue reading “Split and continuous sleep in teens impact cognition and glucose levels differently”

The fall of the Western part of the Roman Empire

Medieval history begins with the dissolution of the Western Empire, with the abandonment of the Latin world to German conquerors. Of the provinces affected by the catastrophe the youngest was Britain; and even Britain had then been Roman soil for more than three hundred years. For Italy, Spain, and Gaul, the change of masters meant the atrophy of institutions which, at first reluctantly accepted, had come by lapse of time to be accepted as part of the natural order. Continue reading “The fall of the Western part of the Roman Empire”

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