No.
People do not have any close enough species to successfully reproduce with. Even the closest species to humans (orangutans, chimps, and gorillas) are far too separate to breed with.
Some other animals are capable of hybridization, or can breed with each other to produce offspring. Hybrids like mules, wholphin, hybrid iguana, and killer bees can exist in nature, and can even be capable of reproduction on their own. Most hybrids are sterile and cannot reproduce.
Hybridization is frequent in plants, and is capable of producing fertile offspring. Limequats, loganberries, wheat, and grapefruit are all hybrids of various plant species.
The biggest factor in hybridization is genetic compatibility. if two species are too far removed, they will be unable to hybridize. For example, if one species has more chromosomes than the other, hybridization is impossible. There are no human/animal hybrids.
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