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GQ GMC-500Plus Geiger Counter

GQ GMC-500Plus Geiger Counter logs beta, gamma, and X-ray levels for environmental monitoring, training labs, and safety demonstrations.

The delayed rise of present-day mammals

A new study has found that the ancestors of modern mammals did not quickly evolve and spread to fill empty niches following the mass extinctions of dinosaurs. Instead, diversification rates dropped and stayed low for 40 million years, with modern mammal orders emerging around 50-55 million years ago.