What year was the conversation with the Sidereal Messenger?

How does the threshold prevent a neuron from generating too many action potentials? What are the letters AM after name? Do sensations first enter the level of consciousness at the level of the cortex? Where did the word integumentary originate from? Why does a male lion has the main on his head but a female does not? What is someone from San Antonio called? What kind of brake fluid does a 1992 dodge use? Which type of translation conveys the basic information from the original work but usually not the original writer's style or specific cultural context? What does a cedar waxwing bird look like? How do you repair leaking stabilizer cylinder on john deere 410b backhoe? What is the origin of the word universe? What do cricket larvae look like? Where are Subarus manufactured? What should you do after saying i love you and she doesnt say it back? How do you change transmission solenoid on a 2002 acura? Was there a show jumper called Sally ennor? What is the exact date of the planet mercury's discovery? What is -3- 4? Why shouldn't backpacks be banned? Where is the book Criss cross take place?

What year was the conversation with the Sidereal Messenger?