What causes the moon to change phases throughout the month? explain

Nitrofurantoin used during the fifth week of pregnancy places the neonate at risk for which condition?

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

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