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Months before COVID-19 was declared a pandemic, efforts were already underway to ensure low-income countries would get access to future vaccines against the infection. The book "Fair Doses" tells that story and discusses the ongoing fight for vaccine equity around the world.

A 2023 astronaut photo shows off an unusual cranium-like structure appearing to stare up into space from the floor of a large volcanic caldera in Chad.

Most fruit is pretty small, so why do pumpkins grow to such enormous sizes?

An unusual stone circle that's likely a tomb is providing archaeologists with more information about life in Roman Bavaria.

Researchers have determined the age and origin of a massive tree that was found at the pre-Columbian city of Cahokia in what is now Illinois.

The interstellar comet 3I/ATLAS is barreling toward its closest point to the sun as perihelion looms on Oct. 29. How different will it look when it reappears on the other side?

Neanderthals were meat eaters, but new analyses show that their diets included other morsels.

A newfound pottery sherd has cuneiform text from the Assyrian Empire asking the Kingdom of Judah about a late tribute payment.

Humans and our ancestors have been exposed to lead for 2 million years, but the toxic metal may have actually helped our species to develop language — giving us a key advantage over our Neanderthal cousins, scientists claim.