In the Bhagavat Purana, mention is made about human and even celestial human existence on other planets. There is even one comment about their visit to the Earth.
So don't don't doubt the possibility that the residents of The Moon and Mars might have taken a beating at the time of the Mahabharat War, aka The Bhagavad Gita War. Don't doubt the possibility that they might not have been swept from the surface.
Read on ...
The Bhagavat Purana paints a different description of the planet. In the ninth canto, 18th chapter, a narration describes the activities of Devayani, the daughter of Shukra- the predominating regent of the planet Venus.
There, a palace garden is described full of lotuses, and trees of flowers and fruits, inhabited by sweetly singing birds and bumble bees. It is described that lotus-eyed girls took a walk along the bank of a reservoir. At one point in the narration, Shukra-Acharya, Devayani’s father, made a comment about grains in the field. According to this description, Venus seems to harbor life as on Earth.
In fact, according to the Puranic descriptions, there is life and activity on all the planets. For example, in the Bhagavat Purana, Canto 4, Chapter 20, Text 35 - 36, a reference is made to the way in which Maharaj Prithu, a king of the Earth, paid his respects to visitors from various celestial planets, and then a reference is made to the inhabitants of the earthly planets.
Now first of all, the reader will note that the text refers to earthly planets, in the plural. In the Vedic literature, one term used to refer to the Earth is Bhu Mandala, which means the " circle of the Sun, " which seems to refer to the planets along the plane of the solar system, as pointed out by Dr. Richard L. Thompson in his book “Mysteries of the Sacred Universe.” This is why the plural is used, the planets in the solar system are somehow grouped together in this sense because they are all on the same orbital plane. It is interesting, though, that we don’t apparently see inhabitants on any of the other planets in the solar system.
In fact, the Apollo astronauts have supposedly gone to the Moon and found no life there. Through their telescopes and space probes, astronomers tell us that there is no life on the other planets such as Mercury, Venus and Mars, either.
A C Bhaktivedanta Swami never agreed with such conclusions. In his purport to Text 26, Chapter 18, Canto 4 of the Bhagavat Purana, Bhaktivedanta Swami states that “ According to the Vedic literature, it is not true that the Moon does not produce food or that no living entity is living there.” In the purport to Canto 4, Chapter 22, Text 54, Bhaktivedanta Swami writes: “ The Vedic literature, however, repeatedly informs us that the Moon is full of highly elevated inhabitants who are counted amongst the demigods. We are therefore always in doubt about what kind of moon adventure the modern scientists of this Earth have undertaken.” Also, in his purport to the above-mentioned Text 6 from Canto 4, Chapter 20, of the Bhagavat Purana. A C Bhaktivedanta Swami, Prabhupada, mentions: “ In modern scientific society the idea is very prevalent that there is no life on other planets but that only on this Earth do living entities with intelligence and scientific knowledge exist. The Vedic literatures, however, do not accept this foolish theory. ... The Vedas give information that in all planets ... there are varieties of living entities ... We have information from the Vedic literature that in each and every planet, both material and spiritual, there are living entities of varied intelligence.”