Razib Khan

Gene Expression

Back to the Future

Veterinarian with bird flu vaccine

Learn why humans may be at low risk, but cattle are highly susceptible to a recently emerged genotype that is not yet well understood.

Humans Remain at Low Risk to Spread of the Latest Strain of Bird Flu 

Antibiotic use, as well as cognitive impairment and dementia, are both common among older adults, but a new study suggests that they aren't connected. (Credit: Oleg Elkov/Shutterstock)

An older person taking antibiotics.

Learn what a new study says about the ties between antibiotics, cognitive impairment, and dementia.

Antibiotics Might Not be Connected to Cognitive Decline

Fluoride is added to drinking water in some areas in the U.S., and is a successful approach for curbing cavities in children and adults. (Credit: Nikvart/Shutterstock)

A child holding a cup of water.

Learn what the science says about fluoride, a mineral that’s added to water to fend off tooth decay.

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