Questão 1671456

A questão 51 refere-se ao texto abaixo.

The chance of a city-killing asteroid striking Earth is higher than scientists previously believed, a non-profit group building an asteroid-hunting telescope said on Tuesday.

A global network that listens for nuclear weapons detonations detected 26 asteroids that exploded in Earth’s atmosphere from 2000 to last year, data collected by the Comprehensive Nuclear Test Ban Treaty Organisation shows.

The explosions include the February 15, 2013, impact over Chelyabinsk, Russia, which left more than 1,000 people injured by flying glass and debris.

Disponível em: www.scmp.com/news/world/article/1494960/risk-city-killing-asteroid-strikingearth-higher-thought-experts-warn. Acesso em 23 de abr. 2014.

O que o texto fala sobre asteroides?