Engineering D-Day

World War II historians often focus on inventions like radar and the “bouncing bomb” as the history-making tech. Many engineers, however, credit the “Mulberry harbor” with winning D-Day. The Engineer found footage of the floating docks in action in honor of the invasion’s 75th anniversary.

Are You Jelly?

Aerogels are the world’s lightest–that is, least dense–solids. Inspired by a bet two scientists had over jelly in 1931 (yes, as in “peanut butter and…”), aerogels are used as insulation and other capacities in space missions. How well do aerogels work? Find out as the gel defends a chocolate Easter Bunny from a Bunsen burner.