Here are some of the most interesting science news stories I read this week:
Insomniac's brain "like a light switch that is always on"
Fossilized human feces from 14th century contain antibiotic resistance genes
(sounds like that should be evidence of time travel, doesn't it?)
Designing robots that can keep secrets
New structure in dogs' eye linked to blinding retinal diseases
Tiny cracks may hold the secret to stronger glass
Galactic gas stations
Native American city on the Mississippi was America's first "melting pot"
Team models photosynthesis and finds room for improvement
Virtual bees help to unravel complex causes of colony decline
Save money and the planet: turn old milk jugs into 3D printer filament
Alzheimer's in a dish
Researchers seeking volunteers to test vaccine against common herpes virus
Changes in ocean circulation may dramatically accelerate global climate change
Have a good weekend, and see you on Monday!