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- Perryville man arrested for alleged patronizing prostitution, harassment (9/23/16)6
- Video and evidence largely confirm trooper's claims in April traffic stop shooting (9/23/16)9
- Cape man may lose eye after shovel beating, police say (9/25/16)2
- Funeral procession of former Cape Girardeau police chief Henry H. Gerecke (9/22/16)17
- Cape man accused of attacking pregnant girlfriend (9/22/16)
- Driver charged with manslaughter in crash that killed 2 (9/27/16)
- Show Me Center upgrades may allow facility to draw more elaborate shows (9/21/16)17
- Man convicted of Perryville convenience-store heist (9/21/16)
- Planning, design puts renovations of H-H building into hotel on hold (9/26/16)5
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.