# s-astro: a wicked list in the dino-killing range; waiting for new entries

<< Throughout its 4.5-billion-year history, Earth has been repeatedly pummelled by space rocks that have caused anything from an innocuous splash in the ocean to species annihilation. >>

<< It may not happen in our lifetime (..) but "the risk that Earth will get hit in a devastating event one day is very high." >>

<< "We are not ready to defend ourselves" against an Earth-bound object (..) "We have no active planetary defence measures.". Rolf Densing.

Mariette Le Roux. Are asteroids humanity's 'greatest challenge'? June 28, 2017

https://m.phys.org/news/2017-06-asteroids-humanity-greatest.html

FonT

Qui una poetica (quasistocastica) sul "ciottolo Apophis"

http://inkpi.blogspot.it/2006/05/2001-il-ciottolo-apophis.html