Previously classified footage of nuclear explosions tested during the Cold War have been rescued from high-security vaults.

KiwiSaver is a fantastic long-term superannuation scheme but it has one major drawback: limited domestic investment opportunities.

Windflow Technology widened its first-half loss and said it needs new injections of capital.

A union is linking a linesman's injury to its call on Top Energy to halt its plan to lay off 17 workers.

Vector acquired HRV and solar power firm PowerSmart for undisclosed sums.

Keep an eye on your local petrol pump. Prices shouldn't be rising soon, thanks to an oil price slump.

Dutch researchers have found that electronic energy meters can be wildly inaccurate.

Elon Musk just wagered he could solve Australia's looming energy crisis.

Todd Corp deputy chairman Malcolm Whyte has retired after 30 years as a director of the holding company for New Zealand's wealthiest

Gareth Morgan's The Opportunities Party would ban subsidies on fossil fuels, increase the price of carbon and overhaul energy efficiency efforts under a climate change policy launched this evening.

King Country residents are debating the future of the local power trust - which currently pumps more than $1 million a year back into the community Made with funding from NZ On Air.

Z Energy hopes its bio-diesel plant which uses animal fat to make fuel will be operational within the next two months after delays last year.

New Zealand's power system will need some "modest investment" to shore up the security of supply.

The S&P/NZX 50 Index dropped 18.68 points, or 0.3 per cent, to 7148.78.

New Zealand Oil & Gas narrowed its loss in the final six months of 2016 ahead of the Kupe sale.

Cheap oil and a wet spring kept wholesale prices low, offsetting better retail margins.

Energy Minister Judith Collins has put the petrol industry on notice to cooperate with a fuel inquiry but says she is reluctant to intervene in the market.

Energy Minister Judith Collins says a fuel price inquiry will assess whether New Zealand petrol companies are raking in more profits than international counterparts.

The local bottler of Coke-branded drinks ramped up sales volumes in 2016.

New Zealand shares rose as Scales and Mercury gained and Comvita dropped after its earnings report. The S&P/NZX 50 Index rose 16.19

Mercury NZ increased first-half profit 53 per cent, bolstered by favourable North Island hydro conditions and lifted its full year guidance.

Businesses in a small Northland town lost tens of thousands of dollars in revenue after a power cut lasted up to 54 hours.

Chinese companies are big winners in the competition among foreign bidders for stakes in Abu Dhabi's largest oil concession.

COMMENT: Dame Fiona Kidman's submission to the select committee on Pike River was study in empathy, writes Audrey Young.

Trans-Tasman Resources is proposing to mine 50 million tonnes of iron ore per year off the coast of Patea in south Taranaki. Made with funding from NZ On Air.

Trans-Tasman Resources is proposing to mine 50 million tonnes of iron ore per year off the coast of Patea in south Taranaki. Made with funding from NZ On AIr.

Pike River families are meeting with Prime Minister Bill English for the first time this afternoon.

New Zealand Oil & Gas, which is on the prowl for new investment opportunities, has sold its 27.5 per cent stake in the Tui oil fields.

Contact Energy shareholders can expect an increase in annual dividend policy later in the current financial year.

Contact Energy posted a 12 per cent gain in first-half underlying profit and trimmed capital expenditure in the face of weaker sales.