Ubahn

5. The minimum number of members needed for a meeting
7. A four-dimensional analog of a cube
9. A figure of speech in which apparently contradictory terms appear in conjunction
10. The time or date when day and night are of equal length
11. A mythical creature with the body of a lion and the head of a human
14. A very luminous and active galactic nucleus
15. A tall, four-sided, narrow tapering monument

1. An instrument for measuring accurate time in spite of motion or variations in temperature, humidity, and air pressure
2. A collection of myths, especially one belonging to a particular religious or cultural tradition
3. Present, appearing, or found everywhere
4. Lasting for a very short time
6. A heavy noble gas used in light bulbs
8. An ancient tool used for calculation
12. A cloud of gas and dust in outer space
13. A complicated network of winding passages; a maze