Speculation has emerged that penguins may be aliens after scientists found traces of a chemical from Venus in their droppings.

Experts are struggling to explain how phosphine exists on Earth – 38 million miles away from Venus. Scientists in the UK who believe alien life forms may have already been detected say studying penguins could help them identify the types of organisms that exist on other worlds. (The Week, 22 Sept 2021)

My comment: I think this was brought to Earth by an asteroid. After all, why should phosphine be uniquely from Venus? And I don’t know nothing. Any better ideas?