This chapter introduces the concept of detecting strange attractors in turbulence, particularly focusing on the Taylor-Couette experiment. The author, Floris Takens, reviews the ideas presented in his earlier work [19] and compares them with those of Landau and Lifschitz [13]. The main goal is to determine whether experimental data on the onset of turbulence can be attributed to the presence of strange attractors. Takens emphasizes that the power spectrum, while useful, may not contain the necessary information for this purpose. Instead, he proposes algorithms to analyze the experimental data directly, rather than the power spectrum. The Taylor-Couette experiment, where fluid motion between two rotating cylinders is studied, is used to illustrate the concepts. The author assumes that for each value of the angular velocity Ω, there exists an attractor Λ Ω in a Hilbert space H Ω, which describes the asymptotic behavior of the fluid's state over time. The assumptions include the existence of an invariant and attractive manifold M Ω, and a smooth flow induced on M Ω with an attractor Λ Ω. Genericity assumptions are also discussed, particularly in the context of symmetry in the physical system.This chapter introduces the concept of detecting strange attractors in turbulence, particularly focusing on the Taylor-Couette experiment. The author, Floris Takens, reviews the ideas presented in his earlier work [19] and compares them with those of Landau and Lifschitz [13]. The main goal is to determine whether experimental data on the onset of turbulence can be attributed to the presence of strange attractors. Takens emphasizes that the power spectrum, while useful, may not contain the necessary information for this purpose. Instead, he proposes algorithms to analyze the experimental data directly, rather than the power spectrum. The Taylor-Couette experiment, where fluid motion between two rotating cylinders is studied, is used to illustrate the concepts. The author assumes that for each value of the angular velocity Ω, there exists an attractor Λ Ω in a Hilbert space H Ω, which describes the asymptotic behavior of the fluid's state over time. The assumptions include the existence of an invariant and attractive manifold M Ω, and a smooth flow induced on M Ω with an attractor Λ Ω. Genericity assumptions are also discussed, particularly in the context of symmetry in the physical system.