Why did dr Tyson deside to exclude Pluto from exhibits of planets?

Is Manitoba earthquake free? Why is there frost on the cars on mornings when the day is going to be warm but not on days its going to stay cold? Do egg cells have chemicals on the tip of the head? What are the two types of cells found in the testes? How are archea helpful? What are the Kinetic Molecular Theory effects on the pressure and volume of the gas sample? How many acres are in Bakersfield? What fraction is one centimeter of a meter? What explains the seasonal variation in the number of hurricanes that form in the Atlantic? What happens if a product is added to a system at equilibrium? What diagram models replication in which DNA is copied before mitosis occurs? Will ice melt faster wrapped in plastic foil and aluminum foil and put it outside or if you put it inside? What is an non example of chloroplast? What is the expected genotype ratio for a one-factor cross of two hybrid organisms? Locations of satanic churches? How many hours does it take for all planets to go around the sun? What are five elements that are noble gases? Why are continuously moving ecosystems unique? What is to blame for increased global warming? When did the Venus express arrive at Venus?