News
- Health & Medicine
Novel typhoid vaccine surpasses old ones
A new vaccine links a sugar molecule found on the surface of the bacterium that causes typhoid fever with a genetically engineered version of the exotoxin protein, which arouses the immune system to churn out antibodies against the bacterium.
- Anthropology
Peru Holds Oldest New World City
Construction of massive ceremonial buildings and residential areas at a Peruvian site began 4,000 years ago, making it the earliest known city in the Americas.
-
When parents let kids go hungry
Researchers comparing Northern and Southern birds have confirmed a prediction about parents protecting themselves at their offsprings' expense.
