," host astrophysicist Neil de Grasse Tyson explores such provocative questions as: would "ETs" resemble us or the creatures of science fiction?Are there "aliens" already amongst us on Planet Earth—brainy creatures whose intelligence is very different from our own? These questions are as ancient as human curiosity itself.

Tyson leads viewers on a cosmic journey to the beginning of time and into the distant reaches of the universe, searching for life's first stirrings and its traces on other worlds.

NOVA presents some startling new answers in "Origins," a groundbreaking four-part NOVA miniseries hosted by dynamic astrophysicist Neil de Grasse Tyson, Director of the Hayden Planetarium at the American Museum of Natural History.

And are planets on which life can flourish rare or common in our universe? And on "Origins", a four-part NOVA mini-series, we'll hunt for the answers. Imagine meteors delivering Earth's oceans from outer space.

A hellish, fiery wasteland, a molten planet hostile to life, yet somehow, amazingly, this is where we got our start. How did the universe, our planet, how did we ourselves come to be? Descend into a toxic underworld where bizarre creatures hold clues to how life got its start.

The Planetary Society planetary.org/ The Planetary Society is a nongovernmental organization for space advocacy.

On its extensive Web site, access the latest headlines, research findings, and general information on large bodies within our solar system.

And for centuries we've been asking ourselves, "How unusual is all this? Is our little planet Earth the only place where the action is? " Sometimes they're friendly and sometimes they're not.

Screenwriters have come up with some pretty interesting behaviors for their extraterrestrials, but they often ignore some basic principles of biology.

This material is based upon work supported by the National Science Foundation under Grant No. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Origins Education Forum origins.The Space Telescope Science Institute, in association with NASA, offers this rich interactive site devoted to origins research.

Science: it's given us the framework to help make wireless communications clear. Major funding for "Origins" is provided by the National Science Foundation, America's investment in the future.