Beginnings (Day 1, "initial")

• Some of these animals are leatherbacks (3 7)
• A liquid having a pH that's low and falling? (4 4)
• This moves backwards along a road (7 3)
• Our area we can detect, in cosmology (10 8)
• R isn't one of these, but L and V are (5 8)
• Enclosed yellow thing in the white (3 4)