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Articles on Worms

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Whether in the wild or in the lab, worms have an interesting story to tell. Sinhyu/iStock via Getty Images

Why do scientists care about worms?

'Worm' is really a catchall term for a huge variety of animals with different characteristics that span the tree of life. They hold clues about our own origins as well as hints about human health.
Amaga expatria, a spectacular species, has just been reported in Guadeloupe and Martinique. Pierre & Claude Guezennec

Land flatworms are invading the West Indies

Several species of flatworms have invaded the West Indies, and some are spectacular. We take stock of the situation with a study published at the same time as this article.
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

What are parasites and how do they make us sick?

There are three classes of parasites that can cause disease in humans. Here's what you need to know.
Leeches suck blood because it is a very good food for them. Some leeches only need to feed once a year. Pixabay

Curious Kids: why do leeches suck our blood?

The short answer is that leeches need blood to grow and reproduce. But it's in their interests to do it carefully, without causing too much pain, and in spots that are hard to find.
The “hammerhead” of Diversibipalium multilineatum. This species can reach 40 centimeters (16 inches) in length. Pierre Gros

Yes, giant predatory worms really are invading France

Several giant terrestrial Plathelminth species have invaded France and its overseas territories, threatening biodiversity. Thanks to participatory science, the invasion is finally recognized.
Worms do have something in their mouth that they can poke out, like a tongue. It is called a stylet. Flickr/DJ SINGH

Curious Kids: Do worms have tongues?

The short answer is no. But worms can use different parts of their body to do some of the jobs that our tongues do - like tasting and crushing food.
Threadworm infection is common but it’s often asymptomatic. Ayaka Darkly/Flickr

Health check: the low-down on ‘worms’ and how to get rid of them

Intestinal worms (or helminths) are multicellular parasites that live inside the gut. When mature, they can generally be seen with the naked eye. In developing countries with poor sanitation, the most…

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