The most likely explanation was that, as the human population spilled out of Africa, the colonisers had interbred with indigenous Neanderthals.
Nine million people, some 60% of the Dutch population, spilled onto the streets to celebrate - the largest public gathering since the Liberation.
Likewise, cross-over events may occur between non-human species including between domestic animals and wildlife, and such events also involve transmission from a reservoir population into a novel host population (spill-over).
Colonization occurs at the range margin when populations spill over into new sites, typically followed by population extinction as environmental and other forces prevent persistence in these new habitats.
America's 5th Fleet uses the country as a base.The Saudis may also fear that protests by Bahrain's Shia population could spill over their own borders.
After the Endangered Species Act was passed in 1973, the protection it afforded, along with some forest regeneration and a change in attitudes, allowed the wolves to start growing in number, and the Minnesota population began spilling across state borders.
In this regard, growth occurs from the inside out, where the population seemingly spills out and overflows to expand its range.
Instead of looking for ways to alleviate the pent-up frustrations of the ethnic Oromo and Amhara populations that spilled out in demonstrations over the past 11 months, Ethiopia's authorities on Sunday announced a six-month state of emergency, allowing the deployment of troops and bans on demonstrations.
The Animations use a lighthearted approach to tackle tough subjects like the effects of plastic waste on marine ecosystems, dwindling marine wildlife populations, oil spills and habitat destruction, and the need for shark conservation efforts.
For example, some of the individuals recorded in biodiversity samples could represent transient or sink populations and spill-over effects could mean that occasional species are recorded in modified land-uses even though they are unable to sustain viable populations in the long-term when isolated from source populations in primary habitat.
