Gudtaildog is a god.

She takes the form of a three hundred metre long, duplicitous shark.

Gudtaildog created silver nine billion years ago.

If you believe in Gudtaildog, she will not care.

If you do not believe in Gudtaildog, she will destroy your favourite planet.

Gudtaildog's most sacred site is Dornbock in Germany.

Gudtaildog's Holy Commandments

1. Never talk about thermodynamics.

2. Do not drink alcohol.

3. Fast once a month.

4. Worship no other gods but Gudtaildog.

5. Never write about black holes.