- Peter Kinder resigns federal agency post, concludes position unnecessary and waste of tax dollars (6/16/18)2
- Stormy Daniels to visit East Cape Girardeau (6/13/18)20
- Longtime downtown Cape bartender Marcellus Jones remembered by friends (6/12/18)2
- Committee to start planning process for indoor aquatic center in Cape (6/20/18)1
- A community rallies behind Honorable Young Men's Club (6/16/18)1
- Southeast to spend $150,000 to refresh brand with Ohio firm (6/19/18)6
- New urban dance studio opens on Broadway (6/15/18)2
- Jackson natives compete in 260-mile canoe race (6/16/18)1
- Couple charged in beating death at Brick's (6/13/18)
- Mother, child reportedly hit by car in Cape Girardeau (6/18/18)
X-ray shows how beetles breathe
WASHINGTON -- Bugs don't have lungs, so how do they breathe? Maybe more efficiently than people, according to the first close-up view of insects forcing air in and out of tiny oxygen pipes.
It took one of the world's strongest X-ray beams -- a view hundreds of times more detailed than today's medical scans can provide -- for scientists at The Field Museum in Chicago and Argonne National Laboratory to videotape how beetles breathe.
While resting, the insects exchanged up to half the air inside their main oxygen tubes every second -- equivalent to how hard a person breathes while doing moderate exercise, the researchers reported in the journal Science.
These tubes, called tracheae, connect to tiny air holes in the insect's outer coating. For decades, scientists thought air just passively oozed into those holes. Instead, scientists discovered insects somehow squeeze the air tubes throughout their bodies to suck air in and out, much as lungs do.