Leeches suck blood because it is a very good food for them. Some leeches only need to feed once a year.
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 hands of a patient infected by monkeypox in Katako-Kombe, Democratic Republic of Congo, in 1997.
Brian W.J. Mahy/CDC
Monkeypox is very contagious and there is no cure. But the good news is the body can heal itself from the virus. Singapore is the first in Asia, where the monkey smallpox virus has infected humans.
No one can decide what to do with your body but you!
Nina Maile Gordon/The Conversation,
While we can't tell you what to do with your body, we can give you some information to help make an informed decision about shaving your pubic hair.
Life expectancy has more than doubled in the last two centuries. How much more can it increase?
AC Arts Photography via Shutterstock
The link between empire, inequality – and Brexit.
Mitral valve prolapse is one of the most common heart disorders worldwide.
Using a large family whose members suffered from mitral valve prolapse, one of the most common heart diseases worldwide, researchers have discovered one cause of the disorder.
Our experts take a closer look at what’s in store for the country in five key policy areas: health, tax, education, infrastructure and the environment.
Wes Mountain/The Conversation
Now that the Coalition has won the federal election, how will it meet its campaign promises on taxes, the environment, education, health and infrastructure?
Buffalo relaxes in Lake Nakuru surrounded by flamingoes.
Outbreaks often affect the same areas because, once released, the bacteria continues to live as spores in the soil.
Hospitals have a role to play too.
It is not always easy to identify who needs palliative care.
The Conversation / AAP Images
What are the key policy issues on which the 2019 federal election will be fought?
Parmesan cheese, prosciutto, salami, olive oil… Italian food is at the heart of intense diplomatic lobbying.
To defend traditional Italian products such as meats and cheeses – delicious, but often high in fat and salt – the country's government has launched an intense lobbying campaign to fight nutrition labels.
In some Nigerian universities, wealthy female students engage in trasnactional sex for pleasure, while those that needed financial support did it for the money.
The recent maternal health crisis of tennis player Serena Williams was a flash point for many health professionals. A photo of Williams with her daughter from her Instagram account.
As we celebrate moms this Mother’s Day, let's remember that maternal health is a right that many do not enjoy.
Girls have taken off, while boy struggle with an outdated idea of manhood.
Boys are more likely to engage in risky behaviours than girls
Several parents do not want their children vaccinated, for religious or other reasons.
Measles cases in the US have reached their highest in 25 years. A bioethicist argues why parents opposed to vaccination are not just wrong about the science, but about the morals.
The Grattan Institute’s Commonwealth Orange Book 2019 serves as a guide for what the next government should do, and what it should not try to do.
The next government can make its own luck, but it needs to focus on what matters and ignore the rest.
Home visit trials strongly encouraged spouses to get involved.
Home visits as part of community-based schemes to women during and after pregnancy can improve the health of mothers and babies.
Copious amounts of time spent looking at screens is likely affecting our health – so why aren't we doing anything about it?
London: a clean future?
Drivers of polluting vehicles will face a daily charge, but evidence suggests it's a price worth paying.
Beninese women attend a “voodoo” festival.
In some West African communities, age and magico-religious beliefs have a huge role to play in a woman's independence.