Human Sperm Has a Surprising Tail Shape We've Never Noticed Before - 1

Surgical masks provide a measure of protection against a killer flu for American baseball players... Seguir leyendo

Under siege by the Spanish flu epidemic of 1918, nurses in Lawrence, Massachusetts, treat patients... Seguir leyendo

Purplish samples of lung tissue from 1918 tell a story of disease and death. Scientists at the... Seguir leyendo

Spreading potentially lethal pathogens, influenza virus particles (brown) invade cilia (blue) in... Seguir leyendo

Armed with the tools for cultivating a flu vaccine, a scientist at the National Institute for... Seguir leyendo

A woman is mixing more than the ingredients for a meal in a pig-farming village near Nanchang in... Seguir leyendo

A wild duck takes to the skies over Alberta Province, Canada, after biologists tested it for avian... Seguir leyendo

Bundled up against the chill of autumn 2004, 69-year-old Ruby Vogelfanger waits in line outside New... Seguir leyendo

Careful not to transport the H5N1 avian flu virus out of a contamination zone, veterinary workers... Seguir leyendo

Pigs sniff for food at a farm on the outskirts of Mexico City, where an outbreak of swine flu was... Seguir leyendo