NASA's Swift Observatory re-entered the atmosphere over Indonesia after nearly 22 years. Scientists also reported traces of blood in 115-million-year-old dinosaur bones.
Why it matters: Swift studied violent cosmic explosions for two decades.
NASA's Swift gamma-ray telescope re-entered the atmosphere over Sumatra. It studied gamma ray bursts and exploding stars for nearly 22 years. It ended its mission as planned.
Why it matters: Swift's data shaped understanding of the universe's most violent events.