Astronauts may be able to make cement using their own pee (www.sciencenews.org)
Lunar dust and a compound found in urine could be used to build future dwellings on the moon, a new study finds.
A four-holed piece of ivory provides a glimpse into ancient rope-making (www.sciencenews.org)
The tool, unearthed in Central Europe, suggests that locals made devices for stringing together sturdy cords over 35,000 years ago, researchers say.
