Zoroastrianism and Vedic thought share a common Indo-Iranian heritage, and as a result, there are many intersecting ideas and beliefs between the two religions. One of the main areas where this intersection can be seen is in the realm of mythology and cosmology.

Both Zoroastrianism and Vedic thought have a strong emphasis on the concept of duality, with the belief in two opposing forces, good and evil. In Zoroastrianism, these forces are represented by Ahura Mazda, the god of good, and Angra Mainyu, the god of evil. Similarly, in Vedic thought, there is a belief in the two opposing forces of creation and destruction, represented by the deities Brahma and Shiva respectively. This shared belief in duality is reflective of the Indo-Iranian roots of both religions.

Another common aspect of mythology and cosmology in Zoroastrianism and Vedic thought is the idea of a cosmic battle between good and evil. In Zoroastrianism, this battle is known as the "Battle of Frashokereti" and is believed to be the final battle between Ahura Mazda and Angra Mainyu, with the ultimate victory of good over evil. In Vedic thought, a similar concept can be seen in the epic battle between the gods and demons in the "Mahabharata," which is believed to represent the ongoing struggle between good and evil in the world.

Furthermore, both Zoroastrianism and Vedic thought have a strong belief in the concept of reincarnation. In Zoroastrianism, this is seen through the belief in the "Chinvat Bridge," where the souls of the dead must pass over a bridge to reach the afterlife. Similarly, in Vedic thought, there is a belief in the cycle of death and rebirth, known as samsara, and the concept of karma, which determines the nature of one's next life based on their actions in this life.

In terms of cosmology, both Zoroastrianism and Vedic thought have a similar belief in the existence of multiple worlds or realms. In Zoroastrianism, there are three main realms: the physical world, the spiritual world, and the realm of the dead. In Vedic thought, there are also three main realms: the physical world, the realm of the gods, and the realm of the ancestors. This shared belief in multiple realms reflects the idea of a complex and interconnected universe in both religions.

In conclusion, Zoroastrianism and Vedic thought have many intersecting ideas and beliefs in terms of mythology and cosmology. This is not surprising, considering their shared Indo-Iranian roots. The concept of duality, the belief in a cosmic battle between good and evil, the idea of reincarnation, and the belief in multiple worlds are just some of the ways in which these two religions intersect in their understanding of the universe