Complex sentence: The hypothesis of gravity being an entropic force, also called entropic gravity, has a history that goes back to research on black hole thermodynamics by Bekenstein and Hawking in the mid- 1970s.
Split into simpler sentences: The hypothesis of gravity being an entropic force, also called entropic gravity, is a conceptual theory that describes gravity as an entropic force. Entropic gravity has a history that goes back to research on black hole thermodynamics by Bekenstein and Hawking in the mid- 1970s.