Paragraph 2
The scientists say their
is light enough for
to wear. It weighs just 250
. A researcher said: "We have created a low-power, low-
, wireless camera system." He said a big
was making the
. It had to be small and light, with enough power to last a
hours. The researchers said no beetles were hurt in their
. They said
the beetles "lived for at
a year" after the experiments finished.
