Animals with a backbone or spinal column, including fish, amphibians, reptiles, birds, and mammals....
A simulated experience that employs 3D near-eye displays to give the user an immersive experience....
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....
The peace treaty ending World War I, imposing heavy reparations on Germany....
A diagram representing mathematical sets as circles showing intersections and unions....
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....
A biological preparation that provides immunity to a specific infectious disease....