"I had the headset on, so I didn't hear it very clearly. But it
sounded sort of like a drum. It sounds sort of like a sheet of
something being bent."
Source: ISS Cosmonaut Alexander Kaleri, describing
to ground controllers a strange noise heard aboard the station
Friday. It's the second time a mystery sound has startled the crew
of Mission 8 and appears to have originated in the same area as the
first sound, four months ago. A daring two-man spacewalk to find
the source of the odd noise was cut short in February, when
Kaleri's suit malfunctioned. NASA says all systems appear to be
working normally in spite of the noise.