The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust...

Millet is one of the oldest cultivated grains in the world and has been grown throughout Africa...

Sustainable transportation options, such as walking, biking, and carpooling, can help reduce...

Developing countries face unique challenges and opportunities in their pursuit of sustainable...

Religion brings people together. Many religions encourage worship in groups or ceremonies where...