If you live in earth's northern hemisphere, you expect the length of days to change from short in the winter to longest around the summer solstice, june 21st. this is mainly because a) the earth's axis is tilted at about 23.5o. b) of the apparent counterclockwise movement of the earth. c) of the elliptical orbit the earth takes around the sun. d) the tilt of the earth on its axis changes during the year.

The correct answer is "A) the Earth's axis is tilted at about 23.5o". When the Earth completes one revolution on its axis, we have one day; and when it completes one orbit around the sun, we have one year. Besides that, instead of being perpendicular to the sun, the axis of rotation is tilted permanently in 23.5 degrees angle.  This difference in the axis rotation angle causes the northern hemisphere to be exposed to the sun longer, increasing the duration of the day during the summer solstice.

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion

aa dikha du tujhe mera wala dance