Hinduism, originating in India around 1500 B.C., is the world's oldest religion with approximately 750 million adherents, primarily in India, emphasizing principles like karma, dharma, and moksha. Buddhism, founded by Siddhartha Gautama after achieving enlightenment, offers a framework for understanding suffering and the path to nirvana through practices such as meditation and adherence to the Eightfold Path. Both religions share similarities in concepts like reincarnation and moral codes, while also presenting distinct beliefs and practices.