North Korea is encouraging citizens to make manure from their own poop to counter a shortage of fertilizer
North Korea is struggling to source enough fertilizer for its crops
The messy business of scrubbing 2,000 years of bird poop from an Egyptian temple
The crap covered up cartouches and constellations
How will astronauts poop on the moon? – NASA tries to make space toilet
NASA is calling on innovators from around the world to help