Dangerous Experiments - James L. Steele

The lone survivors of the planet Rel are not the only survivors after all. Rel's other two Archeons are still alive.

Rive's fox has been pondering the nature of time and motion. He has figured out how to open portals outside the universe, and he is unable to control these new spheres as they grow, swallowing planets and entire civilizations. He is spreading destruction everywhere he goes, and he can't stop.

Deka and Kylac are the only two who dare chase them, evacuating the survivors along the way, hoping to catch up and put an end to the destruction before more lives are lost, and hopefully before Deka's mate dies again.

Joining them on the journey is Stephen, a man from Earth who yearns to see what's beyond his planet. The people he meets will change his life forever, and perhaps his entire species.

Or so he hopes.