Some graphite grains found within meteorites have large isotopic anomalies indicative of a supernova (SN) origin (¹⁸O excesses combined with ²⁸Si excesses). Microanalysis of these SN graphites (using transmission electron microscopy) revealed lots of internal titanium carbides (TiCs), with a single graphite in some cases containing hundreds of TiCs (25 - 2400 ppm). The supernova graphites formed after the TiCs and were quite good at capturing grains that formed at higher temperatures. In a single 5 micron graphite (KE3e11), hundreds of nanometer-sized TiCs were found (332 different internal grains). These internal grains have been preserved for at least 4.6 billion years in the graphite “time capsule”, and their study with TEM and NanoSIMS can reveal details about supernovae that cannot be uncovered using other methods. This is similar to doing forensic science, but here the explosions are supernovae that predate our solar system and the fingerprints left behind at the scene are characteristic isotopic signatures.