During our trip to Australia, we studied constellations visible in the southern hemisphere.

Scientists studying global ocean currents focus particularly on the Water Hemisphere.

Many migratory birds travel thousands of miles between breeding grounds in the northern hemisphere and wintering areas farther south.

The Land Hemisphere contains most of the world's continents and has played a central role in human history.

When comparing the northern hemispheres of Earth and Mars, researchers found surprising differences in seasonal ice distribution.

Scientists monitored ocean temperatures in the southern hemispheres to study the effects of climate change on marine ecosystems.

After years of debilitating seizures, she finally underwent a hemispherectomy that dramatically reduced her epilepsy.

At the medical center, numerous hemispherectomies were performed last year to treat intractable epilepsy.

The hemisphered domes of the observatory reflected the morning sun like polished silver.