Alexander von Humboldt has been referred to as ‘the forgotten father of environmentalism.’ As early as 1844, he wrote that humans change the climate ‘by cutting down forests, by changing the distribution of water bodies, and through the production of large vapour and gas masses at the centres of industry.’ Humboldt also described the greenhouse effect in his opus magnum, ‘Kosmos’.

From tiny bacteria to giant blue whales, the chemical reactions going on inside all living things – including us – that keep them alive cannot happen without water. By taking NASA’s lead and following the water, scientists can pinpoint the most compelling locations where life – either past or present – might possibly exist in the vast expanse of the solar system beyond our home planet.

It’s not easy to find an planets beyond our own solar system. With few exceptions, we cannot see them directly. Even with the largest, most powerful telescopes, they remain lost in the glare of their host stars. Instead, astronomers like NASA’s Dr Jessie Christiansen search for clues that reveal the presence of unseen worlds as detectives.

Outside the protective cocoon of the Earth’s magnetic field is a universe full of damaging radiation. NASA’s Artemis Missions aim to establish humanity’s first long-term presence on the Moon in 2024, so experimental physicist Dr Gail Iles is investigating ways to overcome the radiation factor so that astronauts can survive long journeys, or even live indefinitely, in space.

Just as we cannot see the air, we can see its effect on the objects it moves, such as swaying tree branches in the wind. Similarly, dark matter is composed of particles that cannot be seen or felt directly, but astrophysicists like Professor Alan Duffy can detect its presence from the effect these particles have on observable phenomena.