NASA says it has found proof that water shaped the rocks on the left, in a photograph taken by the Mars rover Curiosity (left). For comparison, the agency released an image of rocks from the Earth (right).
Pathfinder, 1997: The first mission to land a rover on Mars, Pathfinder touched down in Ares Vallis, an ancient flood plain in the planet's northern hemisphere. Among the 2.3 billion bits of data sent back by the lander and its rover, Sojourner, were 15 chemical analyses of rocks and soil, which suggested Mars had once had liquid water and a thicker atmosphere.
Opportunity, 2004: Opportunity discovered tiny mineral spheres — nicknamed blueberries — poking out of rocks that were likely formed by water. Researchers using Opportunity's science instruments identified them as concretions rich in the mineral hematite, deposited by water saturating the bedrock.
NASA's Curiosity rover has found definitive proof that water once ran across the surface of Mars, the agency announced today. NASA scientists say new photos from the rover show rocks that were smoothed and rounded by water. The rocks are in a large canyon and nearby channels that were cut by flowing water, making up an alluvial fan.
"You had water transporting these gravels to the downslope of the fan," NASA researchers say. The gravel then formed into a conglomerate rock, which was in turn likely covered before being exposed again.
At the U.N. today, Israeli Prime Minister Benjamin Netanyahu used a graphic to show how far he says Iran will be by mid-2013 in a quest to develop nuclear weapons. He drew the red line to mark where he says Iran must be stopped.
Originally published on Thu October 4, 2012 9:48 am
Israeli Prime Minister laid out in some detail this afternoon his nation's case for taking stronger action against Iran and his nation's response to what he said are "libelous" accusations about how Israel treats Palestinians.
Taking to the stage just minutes after the head of the Palestinian Authority, Benjamin Netanyahu told United Nations delegates this afternoon that Israelis and Palestinians "won't solve our conflicts with libelous speeches at the U.N."
Originally published on Thu October 4, 2012 9:47 am
Israel's government effectively rejects a "two-state solution" to its impasse with Palestinians and instead continues to wage a "campaign of ethnic cleansing" in the territories where his people live, Palestinian Authority President Mahmoud Abbas told delegates to the United Nations this afternoon.
It was an iconic moment, really one of those amazing Olympic moments when a brilliantly smiling Gabby Douglas became the first African-American gymnast to win a gold medal in the individual all-around. People were amazed as she twisted her petite frame and flew through the air with both power and grace. It was the second gold for Douglas. She and her teammates won the team gold medal as well, and since then Gabby Douglas and the rest of the Fabulous Five have become celebrities.
This is TELL ME MORE from NPR News. I'm Celeste Headlee. Michel Martin is away. Coming up, Eric LeGrand was a star college football player until a tackle left him paralyzed. We'll speak with him about his new memoir and his new life. That's in a moment.
But, first, let's turn to housing. The Standard & Poor's Case-Shiller Home Price Index is one of the top measures of the U.S. housing market and the latest report just out this week says prices are on the rise.