In the first large-scale empirical test in animals of its kind, the team examined how rates of extinction and speciation varied across different defensive traits in amphibians. They found that ...

That's because the rates of speciation and extinction can tell us much about the history of our planet. If lots of new species emerge during an interval, this would indicate favourable conditions ...

Actually, it can be. What happened with the finger-length fishes is an example of “introgressive extinction,” otherwise known as reverse speciation. Regular speciation happens when members of ...

Furthermore, according to the study authors, it took a further 6.9 million years before the balance between speciation and extinction leveled out. Disturbingly, the data also revealed that the ...

This allows researchers to reconstruct speciation and extinction rates with great accuracy. Extinction trends can be determined for some species by using molecular dating techniques paired with ...

"This way we could be sure that we were getting a more accurate picture of their biodiversity prior to their total extinction." Using their database, the team then analyzed how ammonite speciation ...

The more species of Homo there were, the higher the rate of speciation. So when those niches got filled, something drove even more species to emerge. This is almost unparalleled in evolutionary ...

Researchers examine factors influencing shark diversity. A multitude of factors, including variations in speciation and extinction rates, determines species richness, but the causes of lineage ...