On hearing the word sky, a blue sheet appears in front of the eyes. But have you ever wondered why the sky is blue? And when ...

According to Bohren and Fraser, when storms appear late in the day, the red light from sunset makes blue things look green, ...

Have you ever gazed up on a clear day, marvelling at the vast expanse of blue overhead, and wondered why the sky isn't, say, green or red? This seemingly simple question delves into the ...

OSAKA--After sunset when Osaka’s central Umeda district dazzles with vibrant neon lights, visitors head upward to enjoy the ...