Future

Question: How is time measured?
  Answer: Time is measured with a calendar or a clock. Time can be divided into years, months, weeks, days, hours, minutes, and seconds. - 174

Question: What is twilight?
  Answer: Twilight is the time of the day when the sun is just below the horizon. During twilight the light from the sky is soft and diffused. - 205

Question: How often does twilight occur?
  Answer: Twilight occurs twice a day, in the early evening and early morning. Twilight usually refers to the period between sunset and dark. - 206

Question: Is time travel possible?
  Answer: We are all traveling into the future. We don't know of anyone who has successfully traveled back in time. - 175