Astronomers and meteorologists measure Earth's seasons differently, which is why their winter start dates are nearly three ...

Health officials in the United Kingdom are warning that this year’s flu season for the Northern Hemisphere is looking like it ...

Despite the first snowfall of the season that arrived earlier this week the official beginning of winter is over a month away ...

Twice a year (once for each hemisphere), the World Health Organization convenes an expert panel to decide, based on the ...