Alaska’s monster tsunami sent water 1,580 feet up a mountain

A volcano famous for its glowing lava lake is hiding a surprisingly complex system of magma deep underground. Scientists at Penn State have uncovered evidence of two previously unrecognized magma sources beneath Nicaragua's active Masaya volcano, raising new questions about how molten rock moves beneath the surface. The discovery is particularly important because approximately 2 million people live within 13 miles of the volcano, which is also a popular tourist destination. Understanding its underground activity could help scientists recognize warning signs of future eruptions and better protect nearby communities.

Walking just 3,000 steps a day could help slow Alzheimer’s-related brain changes, according to new research. Scientists discovered that physical activity was linked to less buildup of harmful tau proteins and nearly half the cognitive and functional decline, even in people already showing early signs of the disease. The strongest benefits appeared at 5,000 to 7,500 daily steps, suggesting that the popular 10,000-step goal may not be necessary.

A space mission is set to launch on Monday that will attempt to grab a piece of Mars' moon Phobos and bring it back to Earth. If it is successful, this will become the first time a sample has been returned from Mars or its moons to be analysed in laboratories here on Earth. It is hoped that the Mars Moons Exploration (MMX) mission, which is led by the Japanese Space Agency, will solve the mystery of how Mars's moons formed.

Fall color covers the forested slopes of Bieszczady National Park, while patches of polonina, a type of high-mountain meadow, have turned tan. The Bieszczady Mountains are renowned not only for forests and mountain meadows but also for charismatic wildlife. European bison, once extinct in the wild , were reintroduced to the area in the 1960s and now roam the hills by the hundreds, according to recent surveys . Additionally, populations of brown bears and Eurasian lynx find refuge and ample food sources in the forests.