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.
Obama nungara in a garden in France.
Photo by Pierre Gros
The predatory flatworm Obama nungara travelled in potted plants from Argentina to Europe, where it's distrupting soil ecosystems. Now, citizen-scientists are helping map their distribution.
Giardia is an example of a parasite you don’t want to catch. Symptoms can include diarrhoea, abdominal cramps, fatigue, weakness and weight loss.
From shutterstock.com