An historic moment took place in space almost 30 years ago. Can you guess what happened? Find out the answer below.

At Not Impossible Now, we feature people on the cutting edge of today's technology, from TEDMED speakers to Google Science Fair finalists. But we’re equally as fascinated by the pioneers of the past.

For Throwback Thursday and World Space Week, we thought we’d quiz our readers about an historic event that happened in space almost 30 years ago. Can you guess what happened?

The answer: On October 11, 1984, Dr. Kathryn D. Sullivan became the first American woman to walk in space during a mission on the space shuttle Challenger. View photos of Sullivan's spacewalk below and share this story to inspire the budding astronauts in your life.

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