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Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain on Mars.

Turuchan pikas play all sorts of games, including swinging from branches, throwing food around and hiding them jumping out at each other.

Scientists have created a single unit of quantum information using a superconducting circuit and a vibrating sapphire crystal.

From tail up to tail down, what do different cat tail positions and movements mean?

"The most acidic natural inland waters are the lakes that lie in the craters of volcanoes, like Kawah Ijen in Indonesia. These lakes are so rich in sulfuric acid that they may have a pH as low as 0.1. To put this in context, fresh battery acid has a pH…

A new federal order requires that U.S. dairies provide milk samples to the USDA so the agency can test the milk for bird flu prior to pasteurization.

The 6-year-old boy found the rock and then didn't tell anyone for three years. But a new examination reveals it was made by some of the last Neanderthals.

A new laboratory study in mice suggests that primates like humans evolved large brains with a helping hand from microbes that live in the gut.

The Space Launch System blasts off from its Florida launchpad.

"Budget overruns, bureaucratic malfeasance, congressional oversight, review-​board reckonings, the whole process of rethinking how to test a space telescope from the ground up: Webb had survived them all. One other factor, however, continued to create havoc with the budget and the launch timeline deep into the 2010s — what Menzel…

The astronaut and MIT engineer's monumental milestone was marred by misogyny: "Instead of being on cloud nine, I’m crying in my seat."