M. Mitchell Waldrop M. Mitchell Waldrop | Knowable Magazine The Future Fusion power: Are we getting any closer? Scientists have been chasing the dream of harnessing the reactions that power the Sun since the dawn of the atomic era. Interest, and investment, in the carbon-free energy source is heating up. Hard Science Can cosmology untangle the universe’s most elusive mysteries? From the Big Bang to dark energy, knowledge of the cosmos has sped up in the past century — but big questions linger.