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The ultrarelativistic scattering of two "elementary" objects interacting gravitationally is a problem that has inspired several interesting developments over the last four decades. I will review some of these developments in (super)gravity and string theory, and finally discuss how they are helping us to better understand gravitational binaries in general.
Supported by the "2021 Balzan Prize for Gravitation: Physical and Astrophysical Aspects", awarded to Thibault Damour
Thibault Damour