Pollyanna Hartley

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Berberine: The Most Powerful Natural Supplement on Earth

By Kris Gunnars<p>A compound called berberine is one of the most powerful natural supplements on Earth.<p>It has very impressive health benefits, and …

Astronomers Just Discovered a Morse Code Message in The Dunes of Mars

Not aliens.<p>NASA has spotted a series of strange, dark dunes on Mars that look uncannily like the dots and dashes that make up Morse code.<p>This isn't …

Grow A Bacterial Zoo In A Bottle

How to build your own Winogradsky column<p>In the 1880s, Russian microbiologist Sergei Winogradsky sealed pond water, mud, and nutrients in a clear tube. The column gave rise to a diverse mix of pond bacteria, which organized into layers based on their energy sources: carbon, hydrogen, sulfur, or …

Predator or prey? The eyes have it

House cats have pupils that are vertical slits, but bigger cats, like tigers and lions, don’t. A new analysis of 214 species of land animals, both …

Mathematical déjà vu, and Coffee | Jon Butterworth | Life & Physics

Last week I was in a hotel in Edinburgh where the whole bedroom was vibrating for some unexplained reason, at an almost imperceptible level. The Bessel functions in my glass of water were a key part of the evidence that persuaded the manager to move us<p>Occasionally I get asked what it was that first …

Physics