VERDICT: MISLEADING The claim conflates a genuinely new scientific finding with a false "recently discovered" framing. The two blobs (formally called Large Low-Shear-Velocity Provinces, LLSVPs, beneath Africa and the Pacific) were NOT recently discovered — they have been known to geophysicists for decades. What IS recent is the new insight linking them to Earth's magnetic field. **Claim-linked findings from primary sources:** 1. **The blobs are not a recent discovery — they are decades-old, well-established seismic structures.** The 2026 *Nature Geoscience* paper by Biggin et al. explicitly refers to them as pre-existing knowledge: "a 'recumbent Y20 pattern' of two large low-velocity provinces (LLVPs) located in antipodal positions close to the equator," citing tomography models from Masters et al. (1996) and Dziewonski et al. (2010) ([Biggin et al., Nature Geoscience 19:345–352, open access](https://www.nature.com/articles/s41561-025-01910-1)). A decade before the TikTok claim, the peer-reviewed review by Garnero, McNamara & Shim (2016) already stated: "Seismic images of Earth's interior reveal two massive anomalous zones at the base of the mantle, above the core, where seismic waves travel slowly," describing them as long-studied "thermochemical piles" ([Garnero et al., Nature Geoscience 9:481–489](https://www.nature.com/articles/ngeo2733)). 2. **The NEW finding (Feb–Jun 2026) is the magnetic-field insight, not the blobs themselves.** Biggin et al. (2026) combined palaeomagnetic records with geodynamo simulations to show that thermal heterogeneity linked to the two LLVPs "have influenced the geodynamo for at least the last few hundred million years" ([Biggin et al., Nature Geoscience](https://www.nature.com/articles/s41561-025-01910-1)). The University of Liverpool's institutional release for the study confirms the framing: the research "identified magnetic evidence that two immense, ultra-hot rock structures located at the base of Earth's mantle, around 2,900 kilometres beneath Africa and the Pacific, affect the underlying liquid outer core" — i.e., the discovery is the magnetic evidence, while the structures themselves are known features ([University of Liverpool news release, Feb 3, 2026](https://news.liverpool.ac.uk/2026/02/03/study-reveals-two-huge-hot-blobs-of-rock-influence-earths-magnetic-field/)). 3. **A second independent 2026 study ties the blobs to the geomagnetic field.** Deschamps et al. (2026, *Nature Geoscience* 19:980–985) modeled the LLSVPs ("commonly interpreted as reservoirs of hot, chemically differentiated material") and showed that beneath them heat flux can be locally negative at the core–mantle boundary — supporting regional stratification at the top of the core and "explain[ing] the onset and termination of long periods without geomagnetic field polarity reversals known as superchrons" ([Deschamps et al., Nature Geoscience](https://www.nature.com/articles/s41561-026-02018-w)). **Bottom line:** "Revealing new insights into our planet's magnetic field" is true (and timely — published Feb/June 2026 in *Nature Geoscience*). "Scientists recently discovered two massive blobs of superheated rock" is false: the blobs were first imaged by seismic tomography decades ago (the LLVP pattern is documented in peer-reviewed literature back to at least the mid-1990s). Presenting a decades-old discovery as brand-new while piggybacking on real 2026 magnetic-field findings makes the claim misleading.