The lightest few elements in the periodic table formed minutes after the Big Bang. Heavier chemical elements are created by stars,either from nuclear fusion in their interiors or in catastrophic explosions. However, scientists have disagreed for nearly 60 years approximately how the heaviest elements, and such as gold and lead,are manufactured. unique observations of a tiny galaxy discovered final year point to that these heavy elements are likely left over from rare collisions between two neutron stars. The work is published by Nature.
Source: phys.org