Today is the time axis, and life from beginning to end a series of days. And the beholder in the Qur'an finds that he used this term and its derivatives in the context of a lot of time talking about what is going on from the events.
Qur'an has addressed to talk about (today) Bdalalath different, ranging from normal day Etjazb ends of the day and night, through the days that he does not know what they are, but God Almighty, the time periods or phases that God created the heavens and the earth.
There already is a Quranic unique in the use of the Koran to the term (today) in the context of the significance of the distance and speed, and the use of modern science began at the hands of Einstein in the early twentieth century.