- Who
- Gemini
- What
- 534 day(s)
- Where
- United States (Battle Creek)
- When
The longest time a two-headed cow has lived is 17 months 15 days. Gemini, a heifer Holstein calf, was born on 4 August 1991 on Russell and Perry Stowells' Farm in Woodland, Michigan, USA weighing 340 kg (749 lb) and died on 19 January 1993.