How did an ancient shark parasite end up fossilized in tree resin?
The finding is like winning the lottery, researchers say
![A great white shark swims through water. Inset is a microscope image of an ancient tapeworm fossilized in amber.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2024/05/050224_sb_tapeworm_feat_REV.jpg?fit=1030%2C580&ssl=1)
A tapeworm found fossilized in amber (inset) looks strikingly similar to tapeworms found in the guts of modern day sharks, scientists say.
by wildestanimal/moment/getty images; inset: C. Luo