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A water bridge over the Klip River in Gauteng, South Africa. Shutterstock

Cancer causing toxicants found in a tributary of South Africa’s second largest river

Harmful pesticides have been found in the widely consumed sharptooth catfish found in a river that runs through Johannesburg.
A needle in a haystack? Search for the first ever biological molecule. Hubble Heritage/Flickr

Why is life left-handed? The answer is in the stars

Researchers have created a star-forming cloud in the laboratory to try to recreate the first-ever biological molecule. The study could explain why such molecules are left-handed.
If gas clouds collided to create big stars, they might look like this during the collision. This is the RCW120 Spitzer Bubble. NASA

Milky Way’s biggest star may have had a different beginning

The current theory of star formation has a problem: it cannot make big stars. In the standard star-making recipe, stars are formed in the depths of gas clouds made from molecular hydrogen. These clouds…

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