Hydranencephaly or hydrancephaly [1] is a condition in which the brain's cerebral hemispheres are absent to varying degrees and the remaining cranial cavity is filled with cerebrospinal fluid.[2]
JPL built and operates the twin Voyager spacecraft. The Voyagers Interstellar Mission is a part of NASA's Heliophysics System Observatory, sponsored by the Heliophysics Division of NASA's Science Mission Directorate in Washington.
One final record that New Horizons could potentially have a shot at is the fastest interstellar spacecraft. This record currently belongs to Voyager 1 that is exiting our solar system at a rate of about 38,600 mph (62,100 km/h).