Month: July 2019

Sunscreen and coral reef damage – in C&EN

Sunscreen protects our skin from the sun, but there’s also evidence that some of the lotion’s ingredients may damage coral reefs. The latest edition of Periodic Graphics looks at the responsible compounds and efforts to combat the problem. Click through to the Chemical and Engineering News site to view the full graphic.

Lubrication at Stonehenge

Tribologists use the iconic image of Egyptians lubricating the logs used to move the large stones and stone carvings.  To rival that — archaeologists studying Stonehenge discovered that these ancient people may have used pig lard to lubricate sleds used to move the massive stones.  Tribologists may need to think about ancient practices more. Stonehenge_from_north,_August_2010.jpg …