-
Jul 3, 2014, 7:32 am32 pts
ENNScientists have speculated for centuries about comets. Why do the become visible on an irregular interval? Why does the tail always point away from our sun? What are comets made of? Are they balls of ice, or more like an asteroid? Now NASA may finally get some concrete answers with a current mission that will…
Trending Today on EcoTopical
![It begins: electric articulated haul trucks reach series production [video]](https://electrek.co/wp-content/uploads/sites/3/2026/04/worlds-first-serial-production-of-electric-articulated-haulers-02-2324x1200-1.jpg?quality=82&strip=all)
Welcome to EcoTopical Your daily eco-friendly green news aggregator.
Leaf through planet Earths environmental headlines in one convenient place. Read, share and discover the latest on ecology, science and green living from the web's most popular sites.
Leaf through planet Earths environmental headlines in one convenient place. Read, share and discover the latest on ecology, science and green living from the web's most popular sites.
