Context: Temporal measurement has occupied scientists and technologists, and was a prime motivation in navigation and astronomy. Periodic events and periodic motion have long served as standards for units of time. Examples include the apparent motion of the sun across the sky, the phases of the moon, the swing of a pendulum, and the beat of a heart. Currently, the international unit of time, the second, is defined by measuring the electronic transition frequency of caesium atoms (see below). Time is also of significant social importance, having economic value ("time is money") as well as personal value, due to an awareness of the limited time in each day and in human life spans.

Question: What has been a prime motivation in astronomy and navigation?
Answer: Temporal measurement

Question: Periodic events and periodic motion have served as standards for what?
Answer: Periodic events and periodic motion

Question: What is the current international unit of time?
Answer: the second

Question: The electronic transition frequency of which element defines the second?
Answer: caesium atoms

Question: Time has personal value due to awareness of it's limited nature in what?
Answer: each day and in human life spans

Question: What groups have been occupied by understanding the life span of humans?
Answer: Unanswerable

Question: How important is a strong economy considered?
Answer: Unanswerable

Question: How do you define the method used for tracking heartbeats?
Answer: Unanswerable

Question: What do caesium atoms affect to make them shorter?
Answer: Unanswerable

Question: Why do scientists want to study caesium atoms?
Answer: Unanswerable

Question: What has been a prime motivation in units of time?
Answer: Unanswerable

Question: What have periodic events and transition frequency have served as standards for?
Answer: Unanswerable

Question: What is the current national unit of time?
Answer: Unanswerable

Question: Why does time have international value?
Answer: Unanswerable

Question: What is an example of a technologist?
Answer: Unanswerable