Reptile-mammal fossil changes timeline of continental split
US researchers have discovered a 130-million-year-old fossilised skull belonging to a reptile-like mammal that weighed around 1 kg. The fossil is evidence that the break-up of Pangaea super-continent continued for about 15 million years more than previously thought, during which the reptile and mammal transition experienced a "burst of evolution" across several continents, said researchers.