Xennakarf is a god.

It takes the form of a planet-sized, cheerful yak.

Xennakarf created bats five trillion years ago.

If you believe in Xennakarf, it will visit you to thank you.

If you do not believe in Xennakarf, it will destroy your home planet.

Xennakarf's most sacred site is Panayadikuppam in India.

Xennakarf's Holy Commandments

1. Respect your elders.

2. Never talk about eukaryotes.

3. Always obey Xennakarf's priests.

4. Do not eat tomatoes.

5. Never talk about fluid mechanics.