Complex sentence: Meselson's team noted that trichothecene mycotoxins occur naturally in the region and questioned the witness testimony, suggesting an alternate hypothesis that the yellow rain was the harmless fecal matter of honeybees.
Split into simpler sentences: Meselson's team noted that trichothecene mycotoxins occur naturally in the region and questioned the witness testimony. He suggested an alternate hypothesis that the yellow rain was the harmless fecal matter of honeybees.