Earliest human ancestor discovered in canada

British and canadian researchers have confirmed that a 505 million-year-old creature is the most primitive known vertebrate - and therefore the ancestor of us all. Found only in the Burgess Shale fossil beds in Canada’s Yoho National Park, Pikaia gracilens has been confirmed as the most primitive member of the chordate family - the group of animals that today includes fish, amphibians, birds, reptiles and mammals.

Averaging about five centimetres in length, it was a sideways-flattened creature something like an eel, that likely swam above the sea floor by moving its body in a series of side-to-side curves.

And through an analysis of 114 Pikaia fossils using techniques including scanning electron microscopy, fine details have been revealed that settle the question of whether it was a chordate or not.

Earliest human ancestor

Back when it was discovered, in 1911, it was classified as a possible annelid worm, a group that includes today’s leeches and earthworms. But there's long been speculation that it was in fact a chordate.

It appeared to have a very primitive notochord – the flexible rod found in the embryos of all chordates, and which goes on to make up part of the backbone in vertebrates. 

Key was the discovery of myomeres, a type of skeletal muscle tissue found only in chordates.

"The discovery of myomeres is the smoking gun that we have long been seeking," says Professor Simon Conway Morris of the University of Cambridge.

"Now, with  myomeres, a nerve chord, a notochord and a vascular system all identified, this study clearly places Pikaia as the planet’s most primitive chordate. So, next time we put the family photograph on the mantlepiece, there in the background will be Pikaia."

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Satellite images reveal 17 lost Egyptian Pyramids!!!

An archaeologist at the University of Alabama in Birmingham says she's discovered 17 lost pyramids in Egypt - without even leaving her desk.

Egyptologist Sarah Parcak used infra-red satellite imaging to find the pyramids, along with more than 1,000 tombs and 3,100 ancient settlements.

Her team used images from a combination of NASA and commercial satellites orbiting 400 miles above the Earth. The infrared images differentiated between different materials beneath the surface, showing the outline of ancient walls.

Once possible sites were discovered via satellite, a team of French excavators confirmed what Parcak saw in the images from space.

"I couldn't believe we could locate so many sites all over Egypt,” she told the BBC, in a documentary which airs this week in the UK and on the US' Discovery channel later this summer.

"To excavate a pyramid is the dream of every archaeologist."

At Tanis, for example, Parcak discovered an ancient network of streets and houses, which are completely invisible from the ground.

"This hints at the possibilities of discoveries to come," she said. "I am excited for my generation and the generations to come. There is enough to be excavated for 50 generations."

Parcak isn't the first archeologist to search for sites from the sky. Earlier this year, Australian professor David Kennedy claimed to have discovered nearly two thousand archaeological sites in Saudi Arabia, simply by using Google Earth.

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