The new Argentine dino might give us clues to what the world was like before the asteroid wiped out their kind.

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Spring officially begins today (March 20) with the vernal equinox, bringing longer days and warmer temperatures to the Northern Hemisphere. The vernal equinox signals the astronomical start of ...

Kin Cheung/Associated Press Supported by By The New York Times As the sun rose in the Northern Hemisphere on Saturday, the moon cut across Earth’s orbit and took a bite out of the sun.

The moon seemed to take bites out of the sun this weekend during a partial solar eclipse in the Northern Hemisphere. The spectacle, only visible for a few minutes unfolded on late morning Saturday ...

On Saturday, skywatchers throughout much of the Northern Hemisphere had the opportunity to witness the Moon partially cover the Sun as a solar eclipse stretched from eastern Canada to Siberia.

The vernal equinox arrives today, marking the start of the spring season for the Northern Hemisphere and the fall in the Southern Hemisphere. On the equator, the sun will be directly overhead at noon.

But it would also change the climate in the Southern Hemisphere ... movements of air that travel across the globe. These waves lower air pressure over northern Australia, pulling in more moisture ...