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Complex animals ‘lived half a billion years ago’
“These fossils are found in rock layers which actually pre-date the oldest fossils of complex animals."

Fossil discovery sheds new light on animal evolution

Newly discovered fossils could alter the way we think about how animals evolved on earth, scientists say.

An international team found a new set of trace fossils - tracks and burrows left by living organisms - that were left by some of the first organisms capable of active movement.

The fossils date back to the period known as the Ediacaran-Cambrian transition around half a billion years ago. In context, dinosaurs lived in the Mesozoic Era, between 230 and 65 million years ago.

This is significant because the trace fossils pre-date similar animals found in the fossil record.

Dr Russell Garwood from the University of Manchester explained: “These fossils are found in rock layers which actually pre-date the oldest fossils of complex animals - at least that is what all current fossil records would suggest.”

They were found in sediment in the Corumbá region of western Brazil. The creatures that made these burrows were about the size of a human hair, measuring from under 50-600 micrometers in diameter. Scientists believe they were ‘nematoid-like’ organisms similar to a modern-day roundworm.

Lead author Luke Parry, from the University of Bristol, added: “Our new fossils show that complex animals with muscle control were around approximately 550 million years ago, and they may have been overlooked previously because they are so tiny.”

The animals that made the fossils are bilaterians, which are more complex and much more closely related to humans than simple creatures such as jellyfish.

Parry added: “Most fossils of bilaterian animals are younger, first appearing in the Cambrian period.”

In order to find the tiny fossils, scientists used x-ray microtomography, which creates a virtual, 3D model of something without destroying the original object. This could offer an unexplored method of tracking animal evolution in deep time.

Image courtesy of the University of Manchester

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Sale of microbeads now banned

News Story 1
 The sale of products containing microbeads is now banned across England and Scotland, Defra has confirmed.

As part of government efforts to prevent these plastics ending up in the marine environment, retailers can no longer sell rinse-off cosmetics and personal care products containing microbeads. These tiny plastics were often added to products including face scrubs, soaps, toothpaste and shower gels.

Just a single shower is thought to send 100,000 of these beads down the drain and into the ocean, where it can cause serious harm to marine life. A ban on manufacturing products containing microbeads previously came into force in January this year. 

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News Shorts
George Eustice announces funding for Bovine Viral Diarrhoea

Farming minister George Eustice has announced a £5.7million funding package to help farmers tackle Bovine Viral Diarrhoea (BVD).

The funding will be available in England for three years through the Rural Development Programme and farmers will be able to apply for one-to-one farm advisory visits by a veterinary practitioner.

The project will recruit local vets who will then work with keepers of breeding cattle to tackle BVD on their farms.