In 2013, Dr. Mark Post and his team at Maastricht University created the first “cultured” burger in the world. Made from muscle-specific stem cells from real cows and later cultured into fibers of muscle tissue thrown together to form a patty, the burger was fully grown in a laboratory. Its cost? US$ 331,000, making it the most expensive burger in the world. Billionaire and Google co-founder Sergey Brin paid the bill.