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First posited by the 16th century Spanish naturalist, José de Acosta, it has been a long-standing theory that the indigenous human populations in North and South America arrived there at the end of the last ice age, via the Bering land bridge, before rising ocean levels cut off the connection between the Asian and North American continents. According to this theory, the migrants made their way south via an ice-free corridor that ran between the Cordilleran and Laurentide ice sheets, cutting southward through what is now the province of Alberta in western Canada.
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One of the more positive aspects of the development of brain-machine interfaces — the technology of linking mind and mechanism — is the promise of allowing paralyzed individuals to regain their mobility through controlling machines via their thoughts. While there has been a great deal of progress in this field over the last few years, one program appears to have had an unexpected effect on the subjects involved, where the individuals were able to regain sensation in, and control of, their paralyzed limbs after learning to use the equipment.
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Earth is a treasure trove of biodiversity, with over 8.7 million known species alive today, and that only represents an estimated 20 percent of all of the existing species that currently exist. But despite the sheer diversity of lifeforms, be it plant, animal, or microbe, we all share a common single-celled ancestor that started to diverge into new species 1.6 billion years ago. And because of that common ancestor, all species have a lot in common when it comes to our DNA: chimpanzees are nearly genetically identical to us; we share 69 percent of our genetic makeup with the otherwise oddball platypus; and we have even one-quarter of our code in common with rice.
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A flood of historic proportions could inundate parts of the Gulf Coast over the next 48 hours. The region has already received record amounts of rainfall, and flooding has killed at least one person and caused enormous amounts of damage across a wide area. Louisiana Gov. John Bel Edwards declared a state of emergency and the Louisiana emergency management office has called it a "historic flood event."

In a 24-hour period over Friday and Saturday, Baton Rouge reported 11.34 inches of rain. The Comite River near Baton Rouge and Amite River near Denham Springs, both in Louisiana, were predicted to set record crests over the weekend.
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