Here he argued the the moon showed radical changes in temperature between day and night while the earth showed much less change.
This enables brittlestars to escape predators and distinguish between night and day.
Was he able to make out vague shapes, or at least perceive, on some level, the difference between night and day?
The O2 tie-up provides returning passengers day and night between the O2 and Waterloo, a vital addition to commuter traffic that is often one-way.
United took three points off Arsenal on Monday while Chelsea's performance in the second half at Tottenham after Didier Drogba came on was like the difference between night and day.
From the village of Ivalo (and with the help of a guide), visitors drive their own team of dogs through pristine, snow-covered fells, covering between 30km and 50km a day, sleeping in remote wilderness huts each night and experiencing the isolation and beauty of Lapland in a section of forest just 50km from the Russian border.
Humanitarian assistance sometimes means the difference between life and death, and that is why courageous men and women have been working day and night to ensure that these supplies are reaching those who need it most.
The temperature on Eros is estimated to vary between 100 degrees Celsius during the day and 150 below zero during the night.
The contrast between Magellan and Vanguard's Windsor Fund is night and day.
The S Pen experience between the first- and second-generation devices is a night-and-day difference: the original Note seems like just a working concept in comparison.
And it is true, when I go home, I do not turn on the TV, because the difference between what you hear on the TV and what you feel on the ground is night and day.
WHITEHOUSE: Remarks by the First Lady at a Campaign Event -- La Jolla, CA
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