Today is the vernal equinox, and traditionally marks the beginning of Spring. It’s also when daytime and night-time are of approximately equal duration.
This has resonance with our (artificial) experimental set-up of day:night (dark:light) for our plants growing in environmentally controlled cabinets. When we present our circadian data we would typically denote ‘the day’ on our slides or papers as white and black bars denoting day and night, respectively.
I suppose today is the day we should be doing our experiments in Nature instead of the growth cabinets…
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