2- Facebook removes 3 billion fake accounts in 6 months

3- School students walk out in global climate strike

4- Major UK festivals to go plastic-free

5- Dog joins 100-meter race, comes in second

6- Mile-wide asteroid with its own moon will fly by Earth on Saturday

7- Stronger than aluminum, a heavily altered wood cools passively

8- April saw big decline in Arctic sea ice cover

9- Melting Small Glaciers Could Add 10 Inches to Sea Levels

10- From airport to spaceport as UK targets horizontal spaceflight