Our Planet Lost Its Giant Space Shield Millions of Years Ago!

Our solar system once crashed through a giant, cold cloud of space dust that temporarily blew away the Sun's protective shield (the giant bubble of magnetic wind that guards us from deep space). Without this cosmic umbrella, our home planet was left totally exposed to harsh space weather, which might have triggered some of our ancient ice ages! Imagine what it would have been like to look up at a completely different, glowing night sky.