A colony of termites
Termites are a type of cockroach that split from their sister cockroach group around 150-170 million years ago. Previous research suggested that, after this split, they very gradually got smaller, but this study did not support this theory.
This photo appeared in the press release "New study overturns popular theory on evolution of termite size".
Free for anyone to re-use, but must be credited to OIST.
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