Scientists analysed the sample.
The sample was analysed by scientists.
Scientists did a DNA test to identify the mummy.
A DNA test was done (by scientists) to identify the mummy.
People described him as 'Iceman'.
He was described as 'Iceman'.
Explorers found the ruins.
The ruins were found by explorers.
They discovered pottery and other artefacts near the site.
Pottery and other artefacts were discovered near the site.
An illness caused his death.
His death was caused by an illness.
They buried the ruler in this tomb.
The ruler was buried in this tomb.
Archaeologists excavated the site 10 years ago.
The site was excavated by archaeologists 10 years ago.
Who buried the terracotta statues?
Who were the terracotta statues buried by?
The Police caught the thieves.
The thieves were caught by the Police.
Someone found the treasure in a field.
The treasure was found in a field.
Who killed the 'Iceman'?
Who was the 'Iceman' killed by?
Thieves hid the treasure inside a cave.
The treasure was hidden inside a cave by thieves.
They didn't excavate the Sphinx until 1925.
The Sphinx wasn't excavated until 1925.