Delicacy ZZ 20

The first major milestone should come in 2024, when four dishes in Australia and six antenna stations in South Africa are made to work seamlessly together as a basic telescope. This proof-of-principle moment will then trigger the array's full roll-out.

By 2028, the SKA will have an effective collecting area of just under 500,000 square metres. But the set-up is such that it can continue growing, perhaps up to the much desired one million square metres, or one square kilometre.

One way this could happen is if more and more countries join the organisation and provide the necessary funds.

The current members are: South Africa, Australia, the UK, China, Italy, Netherlands, Portugal and Switzerland. These countries have ratified the treaty.

Archaeologists in Kenya have dug up some of the oldest stone tools ever used by ancient humans, dating back around 2.9 million years.

It is evidence that the tools were used by other branches of early humans, not just the ancestors of Homo Sapiens.

The tools were used to butcher hippos and pound plant materials like tubers and fruit, the researchers said.

The scientists also found a pig bone in Heath Wood, the only large Scandinavian cremation site in Britain, but this may have been a token or part of a game brought from Scandinavia, rather than a live animal.

They discovered the animals had come from Scandinavia by analysing the strontium in their bones.

This element occurs naturally in rocks, soil and water, before making its way into plants - and, when these are eaten, bones and teeth.