1
00:00:00,000 --> 00:00:05,160
Solar storms may have started life on Earth. 

2
00:00:05,180 --> 00:00:10,210
Earth is the perfect distance from the sun for life to develop. 

3
00:00:10,230 --> 00:00:15,220
But it wasn’t the temperature of the sun that seeded life.

4
00:00:15,240 --> 00:00:20,820
Four billion years ago, our young sun was only 70% of the brightness it is today. 

5
00:00:20,840 --> 00:00:24,420
At this level of brightness, Earth should have been an icy ball. 

6
00:00:24,440 --> 00:00:27,730
So how did Earth warm up?

7
00:00:27,750 --> 00:00:30,870
New NASA research suggests powerful storms from our young sun 

8
00:00:30,890 --> 00:00:33,330
may have been central to warming Earth.

9
00:00:33,350 --> 00:00:38,220
Explosions spew large amounts of energy towards Earth

10
00:00:38,240 --> 00:00:43,350
which may have helped create nitrous oxide, a powerful greenhouse gas.

11
00:00:43,370 --> 00:00:48,350
Energy may have also helped form RNA and DNA, the building blocks of life.

12
00:00:48,370 --> 00:00:52,870
Understanding how Earth evolved will help scientists 

13
00:00:52,890 --> 00:00:58,180
determine what kind of planets could be hospitable for life. 

14
00:00:58,200 --> 00:01:00,007