Human life is fleeting but divinely designed for escaping birth and death through Krishna consciousness.Listen — Srila Prabhupada Uvaca
Śrīmad-Bhāgavatam 1.16.7 — January 4, 1974, Los Angeles 740104SB-LOS ANGELES [39:31 Minutes] SB-01.16.07_740104SB-LOS ANGELES Pradyumna: Oṁ namo bhagavate vāsudevāya. [devotees repeat] [leads chanting of verse, etc.] kṣudrāyuṣāṁ nṛṇām aṅga martyānām ṛtam icchatām ihopahūto bhagavān mṛtyuḥ śāmitra-karmaṇi [SB 1.16.7] [break] [03:12] Translation: "O Sūta Gosvāmī, there are those amongst men who desire freedom from death and get eternal life. They escape the slaughtering process by calling the controller of death, Yamarāja." Prabhupāda: Kṣudrāyuṣāṁ nṛṇām. Kṣudra means very small; āyuṣām, duration of life.
As we can compare that an ant's life or a germ's life... They are also living entities. Their duration of life is very small. There are many flies, they take their birth at night, in the evening, and the whole night they are busy the same way: eating, sleeping, begetting children and being afraid of.
All the qualities are there. In India we have got experience, they are called diwali germs or insects. In the evening before the light—one, two, three—in this way, by midnight, it increases to thousands and millions. And in the morning, at the end of the night, you will find heaps of insects, or dead body.
Heaps. Millions. So there are different grades of life. It is called mṛtyu-loka.
This material world is called mṛtyu-loka: "where everyone dies." But there are grades of duration of life. One living entity has got four minutes' life, another, ten minutes, another, hundred minutes. Then days—one day, hundred days. Then year—one year, or four year, or five year, or utmost hundred years on this planet.
So the human being can live up to utmost hundred year, but in other planets there are other living entities, demigods. And the highest, the topmost planet, is Brahmaloka. And you have learned from Bhagavad-gītā, in the Brahmaloka the duration of life, to our calculation, is very, very long. Sahasra-yuga-paryantam ahar yad brahmaṇo viduḥ [Bg. 8.17].
In the Brahmaloka, the duration of twelve hours, our twelve hours, morning to evening, that is many millions of years to our calculation. So even if you go to that planet, Brahmaloka, as you are trying to go to the moon planet... From śāstra we understand in the moon planet, they live up to ten thousands of years according to heavenly calculation. In each planet, in each society, the calculation is different.