About 10, 000 years ago, modern humans discovered how to make knives out of copper, and around 5, 000 years ago, craftsmen in the Near East began to make them out of bronze.
Physicist (and revolutionary) Max Tegmark likes to say that his grandmother grew up in a different universe, because since the time when she was a child, humans have discovered that the cosmos extends much farther, and obeys vastly different rules, than previously believed.
The H7N9 virus, a form of avian flu not before seen in humans, was discovered in pigeons being sold in the market.
Scientists have also discovered that humans apply our fight-or-flight reflexes not only to predators but to data itself!
When Frisen examined some brain cells in both groups, he discovered that humans born in the '50s have more carbon-14 in their DNA, so the spike we see in trees is echoed in humans.
Strobel claims this gas mixture, harmless to humans, is one of the most potent antibiotics discovered.
Until we discovered that the work was mostly done by humans in call-centres around the world.
BBC: Voice recognition: Which smartphone is the best listener?
The rate at which random changes over the generations occur in mitochondrial DNA is fairly well known and, using that knowledge, Dr Krause estimates that the newly discovered species last shared an ancestor with modern humans about 1m years ago.
They discovered that both young children and chimps "responded like humans typically do" - tending to opt for an equal division of the prize.
BBC: Sharing: Chimp study reveals origins of human fair play
Study co-author Geoffrey Abers of Columbia University said that "there's something important about getting unexpectedly large earthquakes out of small systems that we have discovered here, " adding that "the risk of humans inducing large earthquakes from even small injection activities is probably higher" than had been believed.
BBC: Oklahoma earthquake linked to oil extraction wastewater
Over the next few years researchers discovered that this protein is a growth regulator in organisms from fruit flies to humans.
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