Artist’s impression of Argentinosaurus, a titanosaur

Shutterstock/David Roland

Titanosaur dinosaurs – thought to have been the most important animals to stroll on Earth and which have been discovered on each continent – may need gone hungry and thirsty when constructing nests and laying eggs.

Léa Leuzinger on the College of Buenos Aires in Argentina and her colleagues studied steady carbon and oxygen isotopes in 71 titanosaur eggshells and a tooth, all unearthed from three fossilised nesting websites in Argentina. The fossils are between 66 million and 100 million years previous.

Meals and water include carbon …