As they walk through a park in the distant future, Harl and Ellen talk about their work and their lives. But they will never have a life together because their work as scientists is more important to them than their love. Harl plans to leave Earth, on a long and dangerous journey through space. Ellen plans to stay on Earth, to change the way the human mind works.

When Harl returns to Earth, Ellen will be long dead... and the world will be a very different place.

The Oxford bookworms library offers a wide range of original and adapted stories, both classic and modern, which take learners from elementary to advanced level through six carefully graded language stages:

Stage 1 (400 headwords)

Stage 2 (700 headwords)

Stage 3 (1000 headwords)

Stage 4 (1400 headwords)

Stage 5 (1800 headwords)

Stage 6 (2500 headwords)

This book is at stage 2.

At the end of this book, it supplies questions to help you check your comprehension after reading the story.