![](http://r.ddmcdn.com/w_160/w_640/h_360/gif/videos/polio_oo.jpg)
Since mankind thoroughly eradicated polio, there hasn't been a
single human-infecting disease that's been fully removed from the
global population. Tara explains how this can be, when we've otherwise
advanced so much with our medical treatments.
![](http://r.ddmcdn.com/w_160/w_640/h_360/gif/videos/dnews-appendix-large.jpg)
Thanks to new research, the appendix can finally show itself
in public again. Tara explains why this formerly pointless organ may not
be required equipment but still serves a useful function.
![](http://static.ddmcdn.com/gif/blogs/dnews-files-2014-08-mosquito_Aedes_aegypti20140827x250.jpg)
Scientists warn that a potentially deadly disease may spread
from the tropics to temperate areas of Europe as the result of climate
change.
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