Tilted star system (Science News)
The orbits of all the planets in our Solar System lie in much the same plane. (Pluto's is a bit off, but that's the only one.) The same is true in all the other star systems where we've found more than one planet - until now. Sifting through data from the now-defunct Kepler orbital telescope, astronomers have found a star system where the orbits of two planets are at a 45 degree angle.
Titan Nile (Discover)
Using radar to penetrate the gloom, the Cassini probe orbiting Saturn has discovered a river on Saturn's moon Titan. This river is about the size and shape of the Nile, but it certainly isn't full of water - more like carbon tetrachloride.
Baby math (Science)
Six-month-old babies probably can't count, but they can tell the difference between a bunch of ten dots and a bunch of 20 dots. The better they are at making such distinctions, the better at math they are likelier to be later in life.
"It's a kind of mint" (Phys.org)
Here's a new way to go prospecting: do chemical analysis on the leaves of trees. Trees growing over gold deposits have tiny extra amounts of gold in their leaves
Radio-overactive imagination (New York Times)
Experience with people exposed to radiation, starting with the victims of Hiroshima and Nagasaki, indicate that, at doses below 100 millisieverts, radiation is basically harmless. In this op-ed piece for the New York Times, David Ropeik points this out and proposes that the Fukushima nuclear disaster, while certainly bad, is not as bad as all that, and in fact very little harm has been done directly by the radiation.