Palamok
From Halopedia, the Halo wiki
Palamok is the Yanme'e homeworld. Its atmospheric composition is similar to that of Earth, yet inhospitable to humans. It has average surface temperatures of 29°C to 42°C (84.2°F to 107.6°F), and its gravity is two times that of Earth. This would present a challenge on the evolution of the wings of the Yanme'e, but it gives them excellent flight skills in the gravity of Earth.[1]