SheeEttin

tl;dr:

The research was initiated after scientists on the research team reported seeing occasional flashes of green light while working with an infrared laser. Unlike the laser pointers used in lecture halls or as toys, the powerful infrared laser the scientists worked with emits light waves thought to be invisible to the human eye.

But packing a lot of photons in a short pulse of the rapidly pulsing laser light makes it possible for two photons to be absorbed at one time by a single photopigment, and the combined energy of the two light particles is enough to activate the pigment and allow the eye to see what normally is invisible.

“The visible spectrum includes waves of light that are 400-720 nanometers long,” explained Kefalov, an associate professor of ophthalmology and visual sciences. “But if a pigment molecule in the retina is hit in rapid succession by a pair of photons that are 1,000 nanometers long, those light particles will deliver the same amount of energy as a single hit from a 500-nanometer photon, which is well within the visible spectrum. That’s how we are able to see it.”

Neat! But please don't shine lasers into your eyes even if it's supposed to be invisible.

Alcohol is banned as a performance-enhancing drug for some things like shooting.

tl;dr:

They suggest this indicates that rather than such skills coming about via evolution, it is more likely due to cultural differences, such as males being taught to navigate while females are not.

The researchers state that in most modern societies, boys tend to roam farther from home than girls, due to many factors, including fewer constraints and personal safety issues. Due to behavioral issues, boys are much more often encouraged to play outside, where their playmaking can lead them to roam to places far from home. Quite often such activities are conducted with male peers, allowing the group as a whole to improve their navigational skills. T

I'm sure Israel would be happy to rebuild homes, schools, and hospitals. For Israelis, though.