In Nature Communications– no, not Nature Astronomy, NatComms- just a week ago (vol. 16):
Pilorget, C. Okada, T. Bibring, J. P. et al. Bennu and Ryugu constituents from samples IR analyses and potential source of terrestrial planets’ ingredients p. 9532 s41467-025-65438-z
That’s right, source of terrestrial planets’ ingredients. Pilorget et al. observe the constituents of Ryugu and Bennu (vis-à-vis the returned grains) and attempt to deduce their implications: the implications for currently observing B- and Cb-type asteroids (in the context of the wider C-complex), and more incisively, the implications for the history of the Solar System and the formation of Earth, Mars, etc. Are the water, organics, nitro-compounds, phosphates, etc. found in Bennu (and to a lesser extent Ryugu) more common in carbonaceous asteroids than we first imagined (i. e., from our prior meteorite studies)? And if so, does that imply that the infall of these C-asteroids- originally from the outer Solar System- delivered the stuff of life to Earth (and Mars, etc.)?