What are gravitational waves?

First postulated by Albert Einstein in 1916 but not observed directly until September 2015, gravitational waves are ripples in spacetime. Source: https://earthsky.org/space/definition-what-are-gravitational-waves…

The adventures of a geologist: From shipwrecks to mapping the Arctic

Before directing the Oxford Museum of Natural History, Paul Smith mapped remote Greenland and was once left stranded when his ship went down Source: https://www.newscientist.com/article/mg24432571-600-the-adventures-of-a-geologist-from-shipwrecks-to-mapping-the-arctic/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…