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Maria Sharapova’s fundamental skill is the same whether she takes the banned substance meldonium or an allowed natural enhancer such as beetroot extract. AAP/Filip Singer

Sharapova, drugs and the nature bias

We have an intuitive bias against “artificial” drugs in favour of “natural” drugs, but that distinction is not only false, it is dangerous.
Discworld is a wildly inventive literary creation that sprawls over dozens of books. David Skinner

A beginner’s guide to Terry Pratchett’s Discworld

This Saturday it will be a year since Alzheimer’s stole Terry Pratchett from the world. We mark the occasion with a beginner’s guide to his most enduring creation, the 41-book Discworld series.
People who have many moles on their body – as well as those with atypical moles – have a predisposition to melanoma. ►►haley/Flickr

Research Check: do most melanoma patients have fewer than 20 moles?

A recent study claims most people with melanoma don’t have many moles or any atypical moles. But exploring the study in depth shows these conclusions don’t have a strong foundation.
The shimmer of a heat mirage shows how a hard road surface increases urban temperatures by radiating heat into the air. Wikimedia Commons/Brocken Inaglory

If planners understand it’s cool to green cities, what’s stopping them?

It seems like a ‘no brainer’ to use urban greening to help cities adapt to increasing heat, but the uptake of green infrastructure, such as trees and vegetated roofs, surfaces and walls, is slow. Why?
A 2010 meta-analysis of 33 studies found that children raised by same-sex parents fared just as well as other children. Shutterstock

Same-sex couples and their children: what does the evidence tell us?

There is no convincing evidence that same-sex relationships are less stable than heterosexual relationships, nor that they have a negative impact on the children raised within them.