What russian scientist headed up the soviet space program for many years?

Which sentence is the best explanation of how food surpluses led to a job specialization during the neolithic revolution

Match the following events to the effects they produced. fall of constantinople italian wars hundred years’ war paved the way for the entry of renaissance ideas of peace and renewal arrowright caused an influx of classical greek and roman knowledge and texts into europe arrowright led to the introduction of renaissance thought and ideas to france arrowright

What does separation of church and state mean?