By Mandi Bierly
August 13, 2012 at 06:26 PM EDT

Discovery’s 25th anniversary Shark Week continues tonight with the premiere of two new specials: In 9 p.m.’s Sharkzilla, a team of engineers and paleontologists build a model of a prehistoric 52-foot Megalodon, and MythBusters‘ Kari Byron, Grant Imahara, and Tori Belleci feed it things to chomp on. In 10 p.m.’s MythBusters’ Jawsome Shark Special, Adam Savage and Jamie Hyneman count down their top 25 shark myths of all time — which includes new myths along with their previously tested. Watch an exclusive clip of that show’s opening below.

More clips from MythBusters’ Jawsome Shark Special:

Read more:

Shark Week begins with more ‘Air Jaws’ and one ‘Impossible Shot’ — EXCLUSIVE VIDEO

Shark Week 25th anniversary lineup — EXCLUSIVE

Shark Week 2011: Inside ‘Great White Invasion’ — and the most nerve-wracking two minutes in 24 years?

Shark Week: Inside the best attack reenactments ever!