Linda Hall Library
Science Engineering Technology

The Paradoxes of Time Travel

Science fiction has introduced us all to the idea of traveling into the past – but is it really possible? Sean Carroll talks bout how time travel would possibly work in the context of Einstein’s theory of general relativity, including the hypothetical idea...

When Will We find the Extraterrestrials?

Seth Shostak is Senior Astronomer at the SETI Institute. New technologies for use in the search for extraterrestrial biology suggest that, despite the continued dearth of hard evidence for life elsewhere or signals from other societies, there is good reason to expect...

Exoplanets and the Search for Habitable Worlds

Sara Seager is the Ellen Swallow Richards Associate Professor of Planetary Science and Associate Professor of Physics at MIT. For thousands of years people have wondered, “Are we alone?” With over 400 planets discovered to orbit nearby stars, the existence...