Planets emerge from the dense disk of gas and dust encircling young stars. — NASA Pebble accretion is the leading theory for the formation of exoplanets more massive than the

Sentinel-3 captured this image of Earth’s biggest iceberg, A23a, on 5 April 2025. Larger image The Ocean and Land Colour Instrument on Copernicus Sentinel-3 captured this image of Earth’s biggest

A, C 3D view of the sheet unit overlying the fragmented breccia unit at the eastern rim of the Ritchey crater, HiRISE image on HRSC DEM (architected from Fig. 1C,

A) Sequence alignment tree of the 45 biochemically tested RNAs. Clustering of the RNAs by sequence alignment coincided by the RNA’s use of specific DNA cofactors as coded by different