Disrupted sleep linked with early sign of Alzheimer's

http://www.huffingtonpost.com/2012/02/14/disrupted-sleep-alzheimers-memory-old-age-amyloid-plaque_n_1277252.html

/ neurology /

Your heartbeat could keep your data safe

http://www.newscientist.com/article/mg21328516.500-your-heartbeat-could-keep-your-data-safe.html

/ irregular /

Falcon swoops on cyber criminals

Neural networks monitor your spending patterns & flag transactions that don't match the pattern.  Interesting personal experiences in the comments.

http://www.theage.com.au/national/falcon-swoops-on-cyber-crims-20111216-1oyvo.html

Cuttlefish tricks

http://boingboing.net/2011/10/18/cuttlefish-tricks.html