Why NASA ended Cassini’s mission at Saturn
Cassini still worked when it entered Saturn’s atmosphere. Its planned ending protected the moons, used a dwindling resource, and opened a final window into the planet.
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Stories about engineering
How ISSpresso Made Coffee Work in Space
An espresso machine, a sealed pouch and a capillary cup solved three different problems aboard the space station. Here is what each one did—and what the million-dollar comparison leaves out.
Apollo–Soyuz: When Cold War Rivals Opened the Hatch
The handshake in orbit depended on years of cooperation and hardware designed to meet in the middle.
Gemini 8: Docking, Then a Dangerous Spin
Follow a pioneering orbital docking and the emergency that cut the mission short.
The Tiny Mirror Flaw That Blurred Hubble
A telescope, an optical mistake and the mission to correct its view.
X-37B and Buran: Returning Without a Pilot
Compare two spacecraft and the problem of bringing a winged vehicle back from orbit.
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Why Did Spaceships Lose Their Wings?
Explore why different spacecraft use different shapes to return to Earth.
How the Sun Can Disrupt a Railway Telegraph
A railway message, a restless magnetic field and the engineering problem we now call space weather.
How Green Is an Electric Car, Really?
Follow the charging cable beyond the car to explore electricity, batteries and lifecycle emissions.
Why the Eiffel Tower Was Almost Demolished
Explore the changing purpose of a landmark that was never meant to be permanent.
How Lake Peigneur Swallowed an Oil Rig
Follow the chain of events that connected a lake, a drill and a salt mine.
How Far Did the Deepest Hole on Earth Get?
Compare an extraordinary drilling project with the scale of the planet below our feet.
How Do You Test an Extremely Precise Clock?
What clock comparisons can measure, what uncertainty means, and why a very large number needs context.
Why Aren't All Power Lines Underground?
The everyday engineering choices behind overhead lines, buried cables and repairs.
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Why the World Still Has Different Outlets
The standards, installed systems and everyday decisions behind familiar plugs.
Astronaut Training: Why the Freezing Forest?
Winter camps, underwater rehearsals and cave expeditions prepare astronauts for different parts of a mission. The key is knowing what each exercise can teach—and what it cannot reproduce.
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