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We Are Teachers: 10 Great Classroom Activities for a Wrinkle in Time
This resource from We Are Teachers provides a collection of inspiring ideas for teachers who using Madeleine L'Engle's A Wrinkle in Time in their classes.
BBC
Bbc Science & Nature: Black Holes and Time Travel
This article describes how black holes may provide clues to the possibility of time travel and parallel universes.
BBC
Bbc: Wormholes
The BBC reveals what is known about wormholes, a possible consequence of Einstein's Theory of General Relativity in which space is bent, opening up the possibility of time travel.