SN Online SN Online By Science News October 7, 2011 at 12:12 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print BODY & BRAIN ‘Normal’ B12 levels may not be enough for the brain. Read “B12 shortage linked to cognitive problems.” LIFE A penguin can find its kin even in a sea of black and white. See “Penguins may sniff out relatives.” ATOM & COSMOS A NASA probe has found bizarre landforms on the planet nearest the sun. Read more in “Messenger from Mercury.” HUMANS A teenager’s alcohol use is influenced by the friends of the teen’s boyfriend or girlfriend. See “ Teen daters pal up to the bottle .”