During New Moon, when does the Moon set?

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

What organs comprise the respiratory system of a bird