Paragraph 2
The
with Twain was like lots of
. Whales use contact
so other whales know where
are. The scientists made 36 calls in 20 minutes. Twain answered each call by calling back at the same
. A scientist said her research could make it easier to talk to
. She said: "We can
understand what an alien
might be like
they are not going to be
like ours."
