RT @earthskyscience: Earth’s shadow during the lunar eclipse will be curved. That’s how in 4th century BC Aristotle deduced Earth is round http://t.co/6aj84iAGdA
RT @earthskyscience: Earth’s shadow during the lunar eclipse will be curved. That’s how in 4th century BC Aristotle deduced Earth is round http://t.co/6aj84iAGdA