Using humankind’s first seismometer on another planet, researchers have analyzed the interior structure of Mars for the first time, including its oversize liquid core on.natgeo.com/3BDnd23

Mysteries can capture a whole world—from the moors of Yorkshire to the souks of Marrakech—and their settings often emerge as a central character rivaling any protagonist on.natgeo.com/3eUrtR0

Controlled burns help reduce woody material and invasive species encroaching on open grasslands on.natgeo.com/3BDZqPz

Scientists have found tropical lizards that can “breathe” underwater by exhaling air to create large, oxygen-filled bubbles that cling to their head on.natgeo.com/3y4KyaN

Take a deep dive into the fascinating history of sand dollars on.natgeo.com/3x6eqCh

Despite their popularity, misconceptions about betta fish can lead to them being some of the most commonly mistreated fish in the pet trade on.natgeo.com/3x4hC1k