Ankur Desai

Viktor Orban has long been described as the most pro-Russian leader in the EU.

And it's not just the Russians.

The US Vice President J.D.

Vance was in Budapest this week to lend Mr. Orban his support.

It's strange to see an election splitting NATO, the US with Orban, most other members rooting for the other side.

But time is running out for anyone hoping to influence this election.

A record turnout is expected on Sunday.

Rarely has so much attention from around the world been focused on this small Central European country.

Nick Thorpe reporting.

Chimpanzees are known for their intelligence and curiosity, but also their potential for violence.

They regularly fight over food, mates and rank.

But new research has documented how that aggression seems to have bored over into what amounts to a civil war.

The study in the journal Science follows 30 years of chimp behaviour in Kibale National Park in Uganda.

It's given us an insight into how and why feuds develop between groups.

One of the co-authors of the study is John Mitani, a primate behavioural ecologist at the University of Michigan in the US.

He told my colleague Pete Ross that he initially went to study the group because it was unusually large.

There were well over 100 chimpanzees at the time.

It took several years, actually, to nail down the precise number of chimps, but it was clear that the number was well over 100, and that was double the size of any other chimpanzee group that had been studied in the wild previously.

In this very large group of chimpanzees, I think one thing that they had to do in order to maintain cohesiveness and

to hold together with so many chimps around is to actually cooperate with each other.