Tag: Yellow
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Why (maybe) leaves are yellow in Europe and red in North America
Supposedly it is autumn – though I have just been standing outside in a teeshirt watching Deneb, Vega and Altair appear out of the twilight as though it was mid-July. But leaves are turning yellow as the seasonal clock moves on, no matter what the temporary weather is like. New Scientist offers an explanation as…
cartesian product ... stuff about computing mostly 