(covers information from several alternate timelines)
Makull's homeworld was a Class M planet, in the Delta Quadrant. The USS Voyager scanned this planet in 2371. It was inhabited, but lack of an artificial satellite system or nearby spacecraft suggested a pre-warp civilization. The civilization had constructed artificial waterways, a global aqueduct system, and a long-distance continental transport. Polaric energy was used as a planetwide power source.
In an alternate timeline, an accident in a polaric energy plant devastated the planet in 2371. Its civilization was wiped out and its vegetation was destroyed; everything organic was obliterated. It also left subspace fractures floating across the planet's surface. (VOY: "Time and Again")