An opening in Earth's crust through which molten rock and gases can escape....
Dutch Post-Impressionist painter known for his emotionally vivid works....
Organic compounds essential in small quantities for normal growth and activity of the body....
A simulated experience that employs 3D near-eye displays to give the user an immersive experience....
Animals with a backbone or spinal column, including fish, amphibians, reptiles, birds, and mammals....
A diagram representing mathematical sets as circles showing intersections and unions....
A biological preparation that provides immunity to a specific infectious disease....
The peace treaty ending World War I, imposing heavy reparations on Germany....
A prolonged conflict in Vietnam involving the U.S. and North and South Vietnam....
The smallest country in the world, an independent city-state within Rome....