Still need a Father's Day gift? These bestselling DNA test kits are on sale.

TL;DR: As of June 16, you can save anywhere from $40 to $100 on DNA test kits from 23andMe and AncestryDNA. Only three things in life are certain: Death, taxes, and that DNA test kits make exciting presents for almost any occasion.  Speaking of: If Father's Day has crept up on you, 23andMe and AncestryDNA have your back — both popular DNA testing services are running special deals now through Sunday, June 21. With a mere saliva sample, they'll give your dad a chance to extensively explore his personal history and health, and maybe even connect with a long-lost relative. (That's way cooler than the bacon-scented soap or beer-print tie you were seriously considering ordering — trust us.) Read more...More about Dna Test, 23andme, Mashable Shopping, Ancestry, and Dna Kits