If the collective activity of life—known as the biosphere—can change the world, could the collective activity of cognition also change it?

A team of space scientists has published a paper suggesting that there may be an Earth or Mars-sized planet orbiting beyond Neptune.

A team of space scientists suggest that there may be an Earth- or Mars-sized planet orbiting beyond Neptune.

A team of space scientists has published a paper suggesting that there may be an Earth- or Mars-sized planet orbiting beyond Neptune.