Context and question: Paleobotanists study ancient plants in the fossil record to provide information about the evolutionary history of plants. Cyanobacteria, the first oxygen-releasing photosynthetic organisms on Earth, are thought to have given rise to the ancestor of plants by entering into an endosymbiotic relationship with an early eukaryote, ultimately becoming the chloroplasts in plant cells. The new photosynthetic plants (along with their algal relatives) accelerated the rise in atmospheric oxygen started by the cyanobacteria, changing the ancient oxygen-free, reducing, atmosphere to one in which free oxygen has been abundant for more than 2 billion years.
What organism is credited with starting the oxygen-rich atmosphere on Earth?
Answer: cyanobacteria
Context and question: Albert the Great wrote that wisdom and understanding enhance one's faith in God. According to him, these are the tools that God uses to commune with a contemplative. Love in the soul is both the cause and result of true understanding and judgement. It causes not only an intellectual knowledge of God, but a spiritual and emotional knowledge as well. Contemplation is the means whereby one can obtain this goal of understanding. Things that once seemed static and unchanging become full of possibility and perfection. The contemplative then knows that God is, but she does not know what God is. Thus, contemplation forever produces a mystified, imperfect knowledge of God. The soul is exalted beyond the rest of God's creation but it cannot see God Himself.
What is a tool that God uses to speak to the average man?
Answer: understanding
Context and question: 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.
What is the current national unit of time?
Answer:
unanswerable