In the extremely arid region of Northern Chad, where the average annual rainfall is barely more than 2 millimeters, is a chain of 18 lakes "Unianga." 
lake depends on underground water flows that were formed here a long time ago, when the climate was much Saharan more humid.

The "Hannah Montana" alum will host "Saturday Night Live" this weekend. Buzzy promos show Miley mocking herself: Just like the spoof of her from the "SNL" sketch called "The Miley Cyrus Show," the 18-year-old calls the hosting gig "pretty cool."It was a short getaway, but Sean Penn and Scarlett Johansson made the most of it.
The pair left on a private jet from Van Nuys airport Tuesday morning, then were spotted having dinner in Cabo San Lucas, Mexico, that night, according to sources. Early Wednesday morning, they returned to Los Angeles where Johansson is shooting the film "We Bought a Zoo" with Matt Damon.


On the menu during their Mexican meal? Penn, 50 and Johansson, 26, reportedly enjoyed lobster and, of course, margaritas.


Earlier this week, the twosome were seen sharing a casual lunch at the popular Los Angeles Cuban restaurant, Versailles, where Johansson had her leg draped over Penn.
On February 5, the couple raised eyebrows when they stayed unusually close to each other at a party celebrating "Black Swan" at the L.A. hotspot Sunset Tower Hotel, then reportedly left together.


"They were flirting with each other all night, pretty much ignoring everyone else," a source told PEOPLE at the time.


Johansson's rep told PEOPLE at the time that they the two werenot dating.


Neither of their reps have commented on the pair's most recent sightings.


Johansson and Ryan Reynolds, 34, split in December after two years of marriage. In August of 2009, Robin Wright, 44, filed for divorce from Penn. The couple had been married 13 years.