The document discusses controversial fossil termite nests found in the Jurassic Morrison Formation in New Mexico. While some see this as evidence challenging a biblical timeframe, others question whether they are truly termite nests. The structures, called concretions, appear to have formed underground after sediment layers were deposited, rather than growing epigenously. They have a core of host rock surrounded by an outer casing of protrusions made of different material than the surrounding rock. While some claim these provide evidence for slow evolutionary timescales, others argue their formation could be explained without requiring millions of years.