What is the maximum number of habitable planets for a star, and what does this mean in our search for extraterrestrial life?

What is the maximum number of habitable planets for a star, and what does this mean in our search for extraterrestrial life?
Researchers explore the different mechanisms viruses have evolved to effectively seize host cell ribosomes, and the role they play in the virus’ life cycle.
International team of scientists proposes plans for high-intensity gamma radiation source at CERN.
In a rare occurrence, astronomers have directly observed more than one planet orbiting a star similar to the Sun.
Chemists develop a new technique for observing chemical processes during battery operation.
Computational methods allow researchers to delve deeper into molecular processes, beyond what can easily be achieved with current experimental techniques.
RNA “sandwiches” perform crucial roles in a range of bacterial metabolic pathways.
Generations into a journey, travelers may find it difficult to understand their earth-bound compatriots.
Understanding the mechanisms that regulate coordinated growth in the body and the remarkable parallels between species allows scientists to create a universal model for morphological scaling.
RNA plays a fundamental role in our health and biology, and advancements in imaging techniques are expanding our understanding of its life cycle.