France (1) Worry (1) State, The (1) Sports records (1) Scientists (1) Rent (Economic theory) (1) Possibility (1) Food--Composition (1) Dilemma (1) Digestion (1) Cognition (1) Building (1) Biology (1) Athletic ability (1) Animals (1) Animal experimentation (1) Use studies (1) Use studies (1) Knowledge and learning (1) Mathematical models (1) Research (1) Science (1) Metabolism (1) Experiments (1) Excretion (1) Alimentos--Composición (1) Renta (Teoría económica) (1) Posibilidad (1) Experimentación animal (1) Preocupación (1)