Base Camp at Lake Untersee, Antarctica January 2026 – Dale T. Andersen. (Larger image) Keith: We just completed the camp last night, and today a storm will move in with

Steady-state response in a phase space of effective stellar flux, Seff, and the seafloor spreading rate, rspr (YoungSun_Seff&rspr). – calculated using the F2V (a-d), present-day Sun (G2V) (e-h), and K2V

Alexandra Matiella Novak uses a hand-held spectrometer in the field. — NASA/Caela Barry Editor’s note: This blog entry is adapted from NASA social media content originally published September 12-15, 2023.

Artistic reconstruction of Spongiophyton during the Early Devonian in the high latitude depositional system of the Paraná Basin. Paleoart by J. Lacerda. Lichens were already widespread over 410 million years