Martin McGuigan

The daytime moon is visible almost every day of the month, except those closest to the full moon and new moon. Here's why the moon and sun often share the daytime sky.

As global temperatures rise, the ecology of Antarctica is already changing, but Earth's climate would have to change drastically before the continent could support agriculture and permanent settlers.

Although bigger animals usually have bigger brains, this isn't a perfect measure of their intelligence.

Ecologists say there are three explanations for the abundance of species in the tropics.

Habitual coffee consumption may lower your risk of heart disease and death in a given time period, but the jury is still out on whether it promotes longevity.

Nazi soldiers looted numerous valuable items and tons of gold, but the chances of locating buried treasure are tiny.

Earth has experienced five mass extinction events over its 4.5 billion-year history. A sixth mass extinction is underway as a result of human-driven climate change.

Pigs have sweat glands, but regulate their body temperature in other ways.

The number of people the planet can sustain depends on both the natural constraints of our environment and human choices.

Egyptian art is easily recognizable, but many cultures used similar approaches to represent people and objects.