Pink blood, green blood, or no blood at all – when it comes to what's inside a worm's body, the answer is more complicated – and fascinating – than you'd think.
Was Darwin inspired by the tropical wildlife of his travels to discover natural selection? Actually, pigeons, worms and barnacles were far more prominent in his thinking.
Most of the earthworms in the US Northeast and upper Midwest are nonnative species. Scientists are finding increasing evidence that invasive worms and invasive plants may help each other.
We focus on large, charismatic animals at the expense of these crucial 'lowly creatures'.