In both cases, the researchers have evoked scenarios of Cretaceous vicariance, followed by endemic species radiation within Madagascar and subsequent dispersal from Madagascar to other areas.
Taken with the rapid overall increase in immigrants in the past decade or so, this dispersal may be one reason why immigration has become so controversial.
What we see today is the product of evolutionary events, resulting from the dispersal of a few human populations out of Africa around 60,000 to 70,000 years ago.
Mindlab International director David Lewis said: " We tested the physical properties of 15 most popular types of biscuits, along with aspects of their consumption such as 'dunk ability' and crumb dispersal."
The evidence is clearly starting to suggest that there were multiple migrations and dispersals in different parts of the world going in all kinds of directions and generally mixing up the gene pool.