- Obama shortens sentence of inmate from Cape (1/19/17)9
- Two subjects of interest in 1992 homicide to take polygraph tests (1/15/17)8
- Business notebook: Jackson salon owner also opens a clothing store (1/16/17)
- Area hospitals hope a box helps prevent infant deaths (1/19/17)6
- Cape SportsPlex contractor offers a look at the project (1/15/17)14
- Meat-processing plant faces $70K penalty for Clean Water Act violations (1/17/17)4
- Southeast to lose $3.5 million from state in budget cuts (1/18/17)21
- Local students to perform with choir at inauguration (1/19/17)3
- Subjects of interest in 1992 killing take polygraph tests; results not revealed (1/18/17)2
- Governor cuts $146 million, colleges take hit (1/17/17)
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.