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SHOWING ITS FALSE COLORS

When an animal sees a computer screen, it doesn’t see the same colors as you do because our monitors only properly work for humans. Here's why.
MUST CONTAIN 4 MYSTERY SYMBOLS

Any time a service tries to tell me that my password isn't good enough, it is making a value judgement on my behalf. It is making the tacit, self-important assumption that the account in question matters more than my convenience.
WINNER OF BADASS OF THE YEAR AWARD

Joanna Palani was only 22 when she left her comfortable life as a college student behind in Denmark to join up as a YPG and Peshmerga fighter on the frontlines of the war in Iraq and Syria. She tells us how ISIS soldiers are "easy to kill," but Assad's troops are much harder.
TROUBLE IN THE CANYON

When a group of canyoneering beginners were swept away in a flash flood last September, it was the worst disaster in Zion's 97-year history. And it illustrates a growing question: How far should national parks go to keep their visitors safe?
IF YOU CAN EVEN SEE IT

What runs on electricity and mystery fuel, moves at 80 miles per hour, generates enough power to run communications gear and is quieter than a conversation? Say hello to the military’s stealth motorbike.