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Earth is closest to the Sun in January. So why is that winter?
Summer can't be caused by being closer to the Sun: Earth makes its closest pass around 3 January and is farthest around 4 July. The distance changes by only…
Why October 1582 lost ten days: a calendar year 11 minutes too long
In 1582, Thursday 4 October was followed by Friday 15 October. Ten dates were simply deleted across Catholic Europe. The reason was an error of about 11…