Earthworms make "group decisions"

Photo by Lara Zirbes

A 'herd' of worms travel together

Earthworms form herds and
make "group decisions"

by Matt Walker

Editor, Earth News

BBC EARTHnews

"Earthworms form herds and make "group decisions", scientists have discovered.

The earthworms use touch to communicate and influence each other's behavior, according to research published in the journal Ethology.

By doing so the worms  collectively decide to travel in the same direction as part of a single herd.

"Our results modify the current view that earthworms are animals lacking in social behaviour," says Ms Lara Zirbes, a PhD student at the University of Liege in Gembloux in Belgium.  

"We can consider the earthworm behaviour as equivalent to a herd of swarm."

Ms. Zirbes and colleagues were originally interested in how earthworms interact with other microorganisms in the soil.

These interactions are part of the important ecological role of that earthworms play.

However, the researchers began to notice that the earthworms seemed also to interact with each other.

For the rest of the article go to:

http://news.bbc.co.uk/earth/hi/earth_news

How Flowers Conquered The World

How Flowers Conquered The World

Matt Walker

Editor, Earth News

The great explosion in flowering plants during the Cretaceous Period is one of the great enigmas of evolution.

Charles Darwin had no explanation, calling it an "abominable mystery."

But now scientist think they have solved the riddle of how flowers came to dominate the conifers and ferns that preceded them.

The flowers' secret, they say, was to exploit a change in soil fertility, and create a feedback loop that allowed new flowers to feed off dead ones.

The relative explosion of flowering plants greatly worried Darwin...

This is a really interesting article, to read the rest of it go to:

http://news.bbc.co.uk/earth/hi/earth_news/newsid_8143000/8143095.stm