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You don’t need to watch where you step when it comes to bacteria. Westend61/Getty Images

Do you crush microbes when you step on them?

You can squash small bugs by stepping on them, but can you crush even tinier microorganisms like viruses and bacteria? It turns out that you’d need to apply a lot of pressure.
Terminus of the Recherchebreen glacier in the Norwegian archipelago of Svalbard, about 760 miles from the North Pole. Arterra Picture Library/Alamy

The melting Arctic is a crime scene. The microbes I study have long warned us of this catastrophe – but they are also driving it

To fully understand the extent of climate-related dangers the Arctic – and our planet – is facing, we must focus on organisms too small to be seen with the naked eye.
Antimicrobial resistance is now a leading cause of death worldwide due to drug-resistant infections, including drug-resistant strains of tuberculosis, pneumonia and Staph infections like the methicillin-resistant Staphylococcus aureus shown here. (NIAID, cropped from original)

Removing antimicrobial resistance from the WHO’s ‘pandemic treaty’ will leave humanity extremely vulnerable to future pandemics

Drug-resistant microbes are a serious threat for future pandemics, but the new draft of the WHO’s international pandemic agreement may not include provisions for antimicrobial resistance.
Ancient DNA preserved in the tooth tartar of human fossils encodes microbial metabolites that could be the next antibiotic. Werner/Siemens Foundation

Reconstructing ancient bacterial genomes can revive previously unknown molecules – offering a potential source for new antibiotics

Ancient microbes likely produced natural products their descendants today do not. Tapping into this lost chemical diversity could offer a potential source of new drugs.
Legendrea loyezae, a very rare ciliate that lives in oxygen-free sediments of lakes. James Weiss

How we found microbes rarer than a ticket to the Moon

Microbes are so tiny humans can’t see them without special equipment. But the discovery of 20 new species will help scientists map the evolutionary tree of life.
Science shows that humans are happier and healthier around other animal and plant species. Artur Debat/Moment via Getty Images

Do humans really need other species?

People wouldn’t last long without the countless other species we depend on for survival.

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