The autumn equinox is now upon us! Today marks the moment that the sun crosses the celestial equator, ushering in the beginning of astronomical autumn in the northern hemisphere, which brings with it ...

An Iranian man jumps over a firework celebrating Chaharshanbe Souri, or Wednesday Feast, an ancient Festival of Fire on the eve of the last Wednesday of the Persian year, in Tehran, Iran, Tuesday.

Scientists say Earth’s northern half is darkening faster than the south, reflecting less sunlight back into space and soaking up more of the sun’s energy. A new study based on more than two decades of ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

A new NASA study has uncovered an unexpected and unsettling shift: Earth has grown a full shade darker since 2001. This means ...

Spring is here — officially, at least. The vernal equinox arrives on Thursday, marking the start of the spring season for the Northern Hemisphere and the fall in the Southern Hemisphere. On the ...

Here’s what you’ll learn when you read this story: The radiation budget between the northern and southern hemisphere is steadily widening. A new study suggests that this gap is due to radiation ...

Peak sunshine has arrived in the Northern Hemisphere — the summer solstice. Friday is the longest day of the year north of the equator, where the solstice marks the start of astronomical summer. It’s ...