by Alexis Blue

The link between exercise and the brain may be a product of our evolutionary history and past as hunter-gatherers, researchers say.

Anthropologist David Raichlen and psychologist Gene Alexander, who together run a research program on exercise and the brain, propose an “adaptive capacity model” for understanding, from an evolutionary neuroscience perspective, how physical activity impacts brain structure and function.

Whether you sop it up with bread or use it to boost your cooking, olive oil is awesome. But a lot of chemistry goes on in that bottle that can make or break a product. Take the “extra virgin” standard: Chemistry tells us that a higher free-fatty-acid content leads to a lower grade, less tasty oil. And those peppery notes are thanks to antioxidants that contribute to olive oil’s healthy reputation. Check out the latest Reactions video for more olive oil chemistry, including how to keep yours fresh and how to best use it to give your food a flavor boost.

On the 14th of June, a London apartment block by the name of Grenfell Tower, based in North Kensington, caught fire. In this horrible tragedy, 79 people are presumed to have died from the fire or asphyxiation, even though the fire brigade was tirelessly working on bringing the situation under control. Bringing a 24-storey building under control is a horrifyingly difficult endeavour, even more when it comes to helping victims to escape the fire.