The largest source of deadly air pollution in many parts of the world isn’t cars or power plants—it’s farms. That’s the unsettling conclusion of a study conducted by researchers at Columbia University, who found that agricultural nitrogen emissions are a major contributor to fine particulate matter, tiny particles…
Here's a demonstration common in chemistry classes. Two chemicals, hydrochloric acid and ammonia, are placed next to each other. They don't touch. But one suddenly starts smoking. What happened?
There are people out there who use urine to whiten their teeth. I can tell you how it works. Only you can decide whether you think it's worth it.
To make a concrete bench, add sand, bacteria, calcium chloride, and some really concentrated pee?
For only the second time in NASA history, two astronauts made a spacewalk on Christmas Eve. Astronauts Rick Mastracchio and Michael Hopkins installed a new ammonia pump to fix the cooling loop on the ISS. You can't beat that Christmas Eve, even if you're Santa Claus.
It's one of the most well-known reactions in all of chemistry, but have you ever seen it filmed at high speed? Not surprisingly, the effect is quite gorgeous — and reminiscent of the Earth's churning deep blue atmosphere as seen from space.
Two days ago, astronauts on the ISS discovered some little white flakes suspiciously floating away from the station. And now, they're already floating outside in zero gravity to fix it. From planning to go-time, this has been the most impromptu spacewalk in NASA history, and you can tune in below.
Earlier today, astronauts on the International Space Station spotted "small white flakes" floating away from the ISS and into space. NASA and the Expedition 35 crew on the ISS have fingered those white flakes as ammonia and that the rate of ammonia leaking from the space station is increasing. Hmm. That can't be…
There was a time when police officers were issued special "lady revivers," or vials of smelling salts for fainting women. Faintings aren't so common these days, but anyone who has read a good (or bad) Victorian novel has seen these salts make an appearance. But how do they work? By annoying someone awake, of course.
Hey, did you hear the one about the two women fighting in a Wal-Mart? It's a real gas! No, really, that's not a punchline. Two women threw ammonia and bleach at one another and created poisonous gas in a Wall-Mart:
Earthquake rescues are difficult. Rescuers try to listen for victims, spot them with cameras and use dogs to sniff them out. Someday, they may use metabolite sensors to pick up their stench.
There've been a few scandals in Japan involving food providers tampering with expiration dates, but if every perishable product had these Fresh Labels, tampering wouldn't be an issue: These stickers can never lie.