Hypersonic vehicles — aircraft that can reach speeds of Mach 5 and beyond — are subject to extreme conditions while they are in flight, requiring strong yet aerodynamic materials to keep them both ...

Watch on your schedule; you will receive a link to watch the lecture online immedately upon purchase. Immerse yourself in cultural insights that deepen your travel experience. Want to extend this ...

Can you chip in? This year we’ve reached an extraordinary milestone: 1 trillion web pages preserved on the Wayback Machine. This makes us the largest public repository of internet history ever ...

Ask the publishers to restore access to 500,000+ books. An icon used to represent a menu that can be toggled by interacting with this icon. A line drawing of the Internet Archive headquarters building ...