... US state, Canadian province, or country . ... Supernova showered Earth with radioactive debris . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... space flight . ... space physics . ... Space station provides insight into flame behavior . ... We hope to gain a better knowledge of droplet burning, improved spacecraft fire safety, and ideas for more efficient utilization of liquid fuels on Earth," said Forman Williams from the University of California, San Diego. ...