Rocky alien worlds may need to be young to sustain life

As the search for life in the universe continues, scientists already know that it is not enough to find rocky planets in a star’s habitable zone, the region where a planet can harbor liquid water, a requirement for life as we know it.

This is just the starting point. In fact, other factors, such as nitrogen, may play a role in the habitability of a planetas well as the land to sea ratio. Now, a team of scientists suggests that one of the key features of a rock structure exoplanet is that it must be young – only a few billion years at most. That’s because, to sustain life, a planet needs enough heat to feed a planet. carbon cyclewhich is normally created due to the radioactive decay of elements such as uranium and thorium.

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