This summer we've been releasing a Q+R series we did on Youtube covering hard questions in the Old Testament. This week we are in the book of Leviticus, a very confusing, very ancient book. Tim and Jon discuss issues about being "unclean" in the Old Testament, whether Christians should get tattoos and many other things.
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Q's and Timestamps:

What’s the deal with the law against tattoos in leviticus? And how should modern christians interpret these ancient, obscure laws? (6:34)
What’s the deal with the law against tattoos in leviticus? And how should modern christians interpret these ancient, obscure laws? (6:34)
Would the original readers of Leviticus have known the divisions between ceremonial and moral laws? (14:50)
Would the original readers of Leviticus have known the divisions between ceremonial and moral laws? (14:50)
Why animal sacrifices in the old testament? Why not tree or grain sacrifices? (19:00)
What is the deal with menstruation and uncleanness? (30:23)
Urim and thummim in the Bible? Casting lots and flipping coins? (35:08)
In what ways should Christians who are referred to as priests in the new testament emulate the priests in the old testament? (38:55)
How does the offering model in the Old Testament relate to tithing and the giving practices in the new testament? (41:57)

Links:
Original video conversation:
https://www.youtube.com/watch?v=cgs_287IGKo
Leviticus videos:
https://www.youtube.com/watch?v=IJ-FekWUZzE and https://www.youtube.com/watch?v=WmvyrLXoQio
Additional Resources:
Eric Zanger, German theologian. "who died tragically before he completed his work on the psalms"