Science X Dialog

Are we alone in the universe? The famous SETI (Search for Extraterrestrial Intelligence) program has been trying to answer this question since 1959. American astronomer Carl Sagan, and many others, believed that other human-like ...

We and our colleagues have developed a way to store data using pegs and pegboards made out of DNA and retrieving the data with a microscope—a molecular version of the Lite-Brite toy. Our prototype stores information in ...

How big were the world's ancient cities? At its height, the world's first city of Uruk may have had about 40,000 people about 5,000 years ago. In the medieval period, London may have had a population of about a quarter of ...

Cells are the basic building blocks of all living things. So, in order to treat or cure almost any disease or condition—including cancer—you first need to have a fundamental understanding of cell biology.

How did human uniqueness first evolve among our ancestors, setting us apart from other animals? That is a question many archaeologists are grappling with by investigating early records of art, language, food preparation, ...

Fields of rust-colored soil, spindly cassava, small farms and villages dot the landscape. Dust and smoke blur the mountains visible beyond massive Lake Malawi. Here in tropical Africa, you can't escape the signs of human ...

From the moas of New Zealand to the dodos of Mauritius, humans have hunted many island-dwelling species to extinction in the relatively recent past. But our research reveals humans haven't always necessarily been agents of ...

Australians are eating and inhaling significant numbers of tiny plastics at home, our new research shows.

The closest star to Earth is Proxima Centauri. It is about 4.25 light-years away, or about 25 trillion miles (40 trillion km). The fastest ever spacecraft, the now- in-space Parker Solar Probe will reach a top speed of 450,000 ...

The thylacine (Thylacinus cynocephalus), commonly known as the Tasmanian tiger, is an Aussie icon. It was the largest historical marsupial predator and a powerful example of human-caused extinction. And despite being extinct ...

Tyrannosaurus rex is perhaps the most famous of all dinosaurs. It and its closest kin, a group referred to as "tyrannosaurs," have been embedded in popular culture as powerful and mobile predators.

Army ants (Eciton burchellii) are known for their vast foraging raids. Hundreds of thousands of ants flow like a river from their nest site, scouring the jungle as they prey on anything unable to escape the swarm.