- What will the Earth be like in 500 years? https://www.space.com/what-will-earth-be-like-in-500-years 12 comments space
- The most Earth-like planet is only 500 light years away http://arstechnica.com/science/2014/04/the-most-earth-like-planet-is-only-500-light-years-away/ 58 comments technology
- Scientists discovered a Earth-Like planet about 500 light years away. http://in5d.com/scientists-discover-another-earth/ 4 comments science
- It's taken scientists 30 years just to figure out how to describe Siphusauctum gregarium, a creature that lived in the ocean 500 million years ago. It's literally like nothing else on Earth. http://www.earthtimes.org/scitech/gregarious-cambrians/1774/ 123 comments science
- Major study confirms that Earth is currently witnessing the start of a mass extinction event the likes of which have not been seen for at least 65 million years. It is being precipitated by human actions over past 500 years. https://theconversation.com/earths-sixth-mass-extinction-has-begun-new-study-confirms-43432 3896 comments science
- Astronomers have found the youngest known pulsar in the Milky Way. The highly magnetic, rapidly rotating neutron star was born from a supernova explosion likely visible to Earth some 500 years ago, around when Leonardo da Vinci painted the Mona Lisa and Michelangelo sculpted David. http://www.astronomy.com/news/2018/10/astronomers-find-the-youngest-known-pulsar-in-the-milky-way 6 comments science
- A mysterious radio source located in a galaxy 500 million light years from Earth is pulsing on a 16-day cycle, like clockwork, according to a new study. This marks the first time that scientists have ever detected periodicity in these signals, which are known as fast radio bursts (FRBs) https://www.vice.com/en_us/article/wxexwz/something-in-deep-space-is-sending-signals-to-earth-in-steady-16-day-cycles 1339 comments worldnews