The SETI programme started in the 1960s. It
uses high-tech equipment and hopes to
establish contact with extraterrestrial life.
Scientists involved in the programme listen to
radio waves using huge radio telescopes. They
truly believe that aliens may be intentionally
sending out communication signals to us.
Despite the enthusiasm of its participants,
however, the programme faces many problems.
For instance, there is little chance of them ever
finding anything and so far nothing has been
found. Perhaps alien civilisations lack the
technology to communicate over long distances -
they may just be wasting their time! If they were
to communicate to us, we would not get their
message for a long time - it takes great patience!
If you would like to take part yourself you can
join the SETI@home project. You can use your
own computer to search for unknown and
unusual signals from radio telescopes.