Simplify the following text for a Grade 12 native English-speaking person.
Original: His series Expeditionen ins Tierreich ( Expeditions into the Animal Kingdom ) broadcast on national German Television from 1965 to 1991 , made him well known in Germany .
Simplified: His series Expeditionen ins Tierreich ( Expeditions into the Animal Kingdom ) broadcast on national German Television from 1965 to 1991 , made him a household name .