BIG INSECTS

November 2007

One of the main theories that explains the existence of large arthropods in previous epochs is the fact that oxygen levels were sometimes much higher, allowing organisms which depend on passive diffusion, like insects, to grow larger. (This was a key aspect of a plot in last year’s TV hit Primeval which featured an unfeasibly large giant centipede from the deep past.) This is a difficult hypothesis to test, but these authors of an open access article in PNAS have done their best, looking at the evolution of trachaea in beetles.

Advertisements

Leave a comment

Filed under Evolution, Insects

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s