A landscaping method developed for water conservation, especially in arid climates....
A colorless, dense, odorless noble gas used in lighting and ion propulsion....
Extensible Markup Language — a flexible text format for data storage and transport....
Ancient Greek philosopher who challenged traditional Greek polytheism....
A dry photocopying technique using electrostatic charges to transfer toner onto paper....
A musical instrument with wooden bars struck by mallets, common in Africa and Southeast Asia....
Traditionally considered the first dynasty in Chinese history, around 2070 BCE....
The study of life forms with different biochemistry than life known on Earth....
High-energy electromagnetic radiation used in medical imaging and security scanning....
One of the two sex chromosomes in humans and other mammals....