They then appeared yjen suddenly out of the sky,ice particles circling the sun like the rings of Saturn, no one knew why or for what reason they appeared then in fact hours later they disappeared ,but then the affect too  was felt worldwide,those that didn't understand the ice particles were naturally scared or freightened by the event,though scientists agreed it was natural too happen .

In then not so then technology advance societies that  like in Africa or other countries they viewed  the event with concern and worry,some thought it was an omen ,in fact they were just ice particles and an unusual occurence indeed but no one really was hurt by it,just scared a little bit.  Some then say being scared was a good thing,kept everybody on those toes and especially those in the world of science . All eyes were trained on the radio telescopes around the world for more ice particles that appeared .

Then the  ice particles were small but heavy in weight  the particles bounced off the sunlight and their many colors could be seen by everyone, Then the ice partucles were alive and moving too .But no one discovered the ice particles as living,they were just solid ice .

Hundreds of years then the ice particles kept moving ,not kmowing where they came or who they were in fact.The particles only knew they needed food and breathing room, their world was dying, too much ice and not enough room to spread yourself live and grow . And then they were so small you think there be room enough for all the ice particles there was .
 

Then the  ice particles only pick Earth because of their ability to smell, they could smell ice and water and travelling through space ice was there but it was mainly contain in asteroids or planets that could sustainj life and hold water there too . So their smell worked to their advantage as well . 

end one shot idea.