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Ancient Sharks Likely More Diverse Than Previously Thought（图）
Ancient Sharks More Diverse Previously Thought
2018/1/31
Sharks have a reputation as ravenous hunters and apex predators, but new analysis of fossil records shows that some of the earliest sharks might have been filter feeders, taking in water through their...
Life in the Precambrian may have been much livelier than previously thought
Life in the Precambrian previously thought
2017/7/20
The Garden of the Ediacaran was a period in the ancient past when Earth’s shallow seas were populated with a bewildering variety of enigmatic, soft-bodied creatures. Scientists have pictured it as a t...