original: It was discovered by Scott S. Sheppard, et al.
simplifications: It was discovered by Scott S. Sheppard. It was found by Scott S. Sheppard, et al. Discovered by Scott S. Sheppard. Scott S. Sheppard and others discovered it. It was discovered by Scott S. Sheppard and others. Scott S. Sheppard, et al, found it. It was discovered by Scott S. Sheppard. Scott S. Sheppard discovered it. It was found by Scott S. Sheppard and others. It was found by Scott S. Sheppard, et al.