Burning Energy.

The spectacular collision set off gravitational waves that traveled 130 million lightyears to Earth, accompanied by light with a spectrum that showed the presence of the heavy element strontium, the first direct observation of a heavy element being forged. A lot of people have made a lot of money spreading myths and misinformation about metabolism. The two neutron stars spiraled into each other in a ripping crash that spilled neutrons into atoms of iron or other lighter elements. [Extracted from the article]