VERDICT: TRUE The viral TikTok claim is substantially accurate. It describes a real, peer-reviewed discovery about the giant radio galaxy J1007+3540, whose central supermassive black hole has restarted its jet emission after roughly 100 million years of inactivity — a clear example of episodic (on/off) active galactic nucleus (AGN) activity. Claim-linked findings: 1. **"Woke up after 100 million years" — CONFIRMED.** The Royal Astronomical Society states the supermassive black hole at the heart of J1007+3540 was spotted "restarting its jet emission after nearly 100 million years of silence," with a compact, bright inner jet indicating recent reawakening. The peer-reviewed paper likewise reports "recurrent jet activity" with inner-lobe radiative ages of ~140 Myr and outer-lobe ages of ~240 Myr, showing the engine turned on, shut down, and restarted. 2. **"Erupting jets of plasma" / episodic dormancy-activity cycling — CONFIRMED.** The study (titled "Probing AGN duty cycle and cluster-driven morphology in a giant episodic radio galaxy") explicitly frames J1007+3540 as "one of the clearest and most spectacular examples of episodic AGN," with young jets layered inside older, exhausted lobes — "the signature of an episodic AGN – a galaxy whose central engine keeps turning on and off over cosmic timescales." This directly supports the claim that black holes cycle between dormancy and activity. Minor caveats (not enough to change the verdict): the object is formally designated **J1007+3540** (the TikTok shortens it to "J1007"), and the "waking up" was detected via radio observations of a young inner jet rather than a literal live event. The claim's "proving" is better phrased as "strong evidence for," but the underlying science is accurately represented. Primary sources: - Peer-reviewed journal paper (MNRAS): https://academic.oup.com/mnras/article/545/4/staf2038/8424076 (DOI: 10.1093/mnras/staf2038) - arXiv preprint of the same study (Cornell University): https://arxiv.org/abs/2601.14219 - Royal Astronomical Society research highlight: https://ras.ac.uk/news-and-press/research-highlights/reborn-black-hole-spotted-erupting-cosmic-volcano