Back to topics

Apollo 13: an adapter was only part of the solution

In April 1970, Apollo 13’s crew needed carbon-dioxide removal equipment from one spacecraft to work with another. The canisters did not fit the same system. Engineers on Earth built an adapter from counterparts of items available onboard, tested it, and sent instructions to the astronauts.

8–10 min

Questions you could explore

  • What made a workable design different from a workable set of instructions?
  • Why did testing matter even when the materials were simple?

Start reading

Ready to try your ideas aloud?

Your topic carries over. Record up to 2½ minutes, depending on your plan.

Engineering and inventions

How GPS finds you, and fixes its clock

Your phone can work out where it is by listening to signals from far above Earth. But turning a signal's travel time into a distance also creates a clock problem: the receiver must account for its own timing error.

12–15 min
Engineering and inventions

Across an ocean inside a fiber-optic cable

A message crossing an ocean can travel through glass fibers lying on the seabed. The light inside, the layers around it, and the equipment along the route each solve a different problem.

8–10 min
Apollo 13: an adapter was only part of the solution | Speech Topic | speaking.app