Skerp

The Skerp were a humanoid race who originated on the planet Mosfel. When Mosfel's sodium-rich soil was suddenly ignited by an oxygen bomb, the Skerp were forced into migration. As they departed their limited-gravity planet with its intensive exposure to the sun, the Skerp became withered and pale, and found other planets' gravities to be so high that they took to walking around on all fours with their heads down. Lacking interspecies social skills (as few other species had been able to visit Mosfel when it was still habitable), the Skerp quickly became pariahs, often reduced to begging aboard space stations.