magnesium and aluminum — inside a graphite capsule, mimicking the theorized composition of Mercury’s interior in its early days. The researchers then subjected the capsule to pressures almost ...

Related: Project Mercury: America's 1st crewed space program Encased in the monument's concrete base is a time capsule containing technical reports, photos, recordings and other memorabilia ...

A 60-year-old tribute to America's first human spaceflight program is standing up to the test of time, but what about the contents of its time capsule not to be opened until 2464? The Project Mercury ...