Twice every year when night and day are of equal length.
Ruled by no one. (Mob)
Sent out numerous expeditions to explore Africa
The Autumn equinox.
The word is "equinoctial" = equal day and night. It occurs twice a year, on the first day of Spring, and the first day of Autumn.
There is only two equinoxes, Autumnal equinox(fall) starts on Sept. 22 or 23, and Vernal equinox(spring) starts on March 20 or 21.
Grassy plants cultivated for food is the most accurate description of grains.
Which description is not an accurate characterization of the Amazon River basin
i
There is no more accurate descriptions of matter than measurements. To get the description right make your measurements precise.
Ruled by no one. (Mob)
Weak
a small group rulers
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changes in the reproductive system
Short and bloodless
manstor
high porosity, low permeability