Sometimes in Vedas such things like the asura's decapitated head chasing after Candraloka, sometimes it is explained allegorically. Just like now we are explaining in 4th Canto of Srimad-Bhagavatam the story of King Puranjana. Just like the living entity is living within this body, and the body is described there as city with nine gates, the intelligence as the Queen. So there are sometimes allegorical explanations. So there are many things which do not corroborate with the so-called modern science, because they are explained in that way. But where is the guarantee that modern science is also correct? So we are concerned with Krishna Consciousness, and even though there is some difference of opinion between modern science and allegorical explanation in the Bhagavat, we have to take the essence of Srimad-Bhagavatam and utilize it for our higher benefit, without bothering about the correctness of the modern science or the allegorical explanation sometimes made in Srimad-Bhagavatam.
Letter to Krsnadasa, 7 November, 1972