Gene flow in giraffes and what it means for their conservation

Giraffes are a beautiful and powerful example of what adaptive evolution can achieve. However, in recent years, they have attained notoriety for a completely different reason: it has been suggested that instead of one giraffe ...

Study finds human population expanded during late Stone Age

Genetic evidence is revealing that human populations began to expand in size in Africa during the Late Stone Age approximately 40,000 years ago. A research team led by Michael F. Hammer (Arizona Research Laboratory's Division ...

Wax flowers and their complex relationship

The wax flowers, which originated in the Oligocene, form the plant genus Hoya, named after the English gardener Thomas Hoy. This genus—as well as the related genera—belongs to the genus group (tribus) of the Marsdenieae, ...

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