Archaeologists discovered ancient mass burials that revealed a forgotten epidemic.

The city organized several mass funerals for victims of the earthquake.

Mass differences between isotopes can affect the decay rates observed in the experiment.

The parish office prepared Mass cards for the families who requested prayers.

The researchers measured the mass defects of several isotopes to calculate their binding energies.

The mass numbers of these isotopes determine their nuclear stability.

On Sunday morning, the congregation gathered for the solemn mass, a service that resembled a High Mass but omitted several of its special ceremonies.

After months of prayer, she requested a votive mass to be offered for the safe return of her brother.

The building's large thermal mass helped stabilize indoor temperatures during the day.

During the solemn High Mass, the priest recited the Canon of the Mass with reverent care, aware of its ancient role in the liturgy.