Exoplanets Exoplanets that orbit a binary star, known as circumbinary planets, can experience large variations in stellar heating over less than the planet's orbital period. Wolf et al. performed three-dimensional simulations of how Earth's climate would differ if it orbited in the habitable zone around a Sun-like star with a smaller stellar companion. Even in extreme cases, they found that Earth's oceans provided enough thermal inertia and negative feedback through cloud formation to buffer the planet against catastrophic climate variations. However, temperatures on land can experience complex additional season-like variations. The authors conclude that circumbinary exoplanets can remain habitable if they have Earth-like oceans. J. Geophys. Res. Planets 10.1029/2020JE006576 (2020).