Simplify the following text for a Grade 7 native English-speaking person.
Original: In theory recent findings in Atapuerca ( Spain ) also suggest that H. heidelbergensis may have been the first species of the Homo genus to bury their dead , even offering gifts .
Simplified: Recent findings in Atapuerca suggest that H. heidelbergensis may have been the first species of the Homo genus to bury their dead .