very large

New research co-led by the University at Buffalo proposes thinking both big and small to confirm their existence, suggesting that their signatures could range from very large -- hollow planetoids in space -- to minute -- microscopic tunnels in everyday materials found on Earth, like rocks, metal and glass.

“The economy is, to a very large extent, driven by psychology,” Perner said.

“By repurposing it in vehicles you protect tourism and prevent people from inhaling it. When we scale up to fuel more vehicles it will require a very large volume.”

“The US-India business relationship is a very large and multifaceted one. Even with these very serious allegations against someone that's such a major player in the Indian economy, I don't think we should overstate the impact that this could have on that relationship,” Mr Kugelman says.

When Prescott became deputy PM in 1997, he was also handed a very large portfolio as secretary of state for the new Department for the Environment, Transport and the Regions.