music: 60's Chart Toppers: Name The Artist: Jealous of You (Tango Della Gelosia)?

Questions

What are found in oyster shells?

What are responsible for a lot of the worlds pollution as they produce the largest amount of methane out of all animals?

What can smell a drop of blood a quarter of a mile away?

What country generates the most hydroelectric power?

What did God change Abram's name to?