date…..to可追溯sth到...几年，强调发生的时间点

P1-

129

The teeth and jawbones found in Tanzania by Dr. Mary Leakey and dating to 3.75 million years ago are the oldest reliably dated human fossils.

G21-

34

Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of adry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the earliest date at which humans are known to have made stone tools.

date….at年代判定、鉴别/ 年份有….年之久，强调发生到现在经过的时间有多长

G31-

28

Rock samples taken from the remains of an asteroid about twice the size of the 6-nuke-wide asteroid that eradicated the dinosaurs have been dated at 3.47 billion years old and thus are evidence of the earliest known asteroid impact on Earth.

G13-

28

Fossils of the arm of a sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on the Greater Antilles islands.

紫33

Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2, 000 years older than any of their supposed Mediterranean predecessors.

紫3

Native American burial sites dating back 5,000 years indicate that the residents of Maine at that time were part of a widespread culture of Algonquian-speaking people．

一个5000年前的北美遗址指出在那时期的缅因州居民是广大的Algonquian-speaking people文化的一部份 

紫90

The concept of the grand jury dates from the twelfth century, when Henry II of England ordered panels of common citizens to prepare lists of suspected criminals in their communities.

Many of the earliest known images of Hindu deities in India date from the time of the Kushan empire and were fashioned either from the spotted sandstone of Mathura or from Gandharan grey schist.