People at risk of COVID-19 infection need to be alerted within 24 hours or contact tracing will be useless, a scientist advising the government has warned.

Europe is in its early stage of summer but is in the middle of an intense heatwave and scientists say it's a preview of what climate change has in store.

The major online platforms say rental listings are up 8-10 per cent compared to last year, as thousands of Airbnbs and other short-term rentals are expected to move to the long-term market as coronavirus halts travel.

Dalhousie professor says the heat has been altering marine ecosystems, harming fisheries and killing various species — and the phenomenon is likely to continue.

Texas reopens restaurants, Utah reopens salons. As several states lift coronavirus restrictions, many warn of a second wave if social distancing ends too soon.

As many as 20% to 25% of healthcare workers in hard-hit areas, experts say, are likely to develop disorders such as anxiety, depression or post-traumatic stress.

Unified theory describes formation of huge, mysterious waves

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In an important step to reduce sentencing disparities for drug offenders in the federal prison system, Attorney General Eric Holder on Monday announced that the Justice Department will soon detail new, more expansive criteria that the Department will use in considering when to recommend clemency applications for the President’s review.

Los Angeles County, which continues to be the hardest hit area in California, announced 51 additional deaths linked to COVID-19 on Thursday.

King Salman bin Abdul-Aziz Al Saud has a long-established record of leading popular campaigns to raise funds for Islamic causes, writes Bruce Riedel. Saudi Arabia has been accused of poor oversight of such funding with some money ending up in terrorist hands. While it has made considerable progress on this issue, more still needs to be done. The three bomb attacks July 4 should encourage the king to take tougher measures to combat terrorism funding at home, Riedel argues.

In July of 2007, the East Coast was slammed by a record-setting heat wave. From New York City to Washington, DC, temperatures averaged above 90 degrees Fahrenheit, causing more than 40 deaths.

The Searaser takes a novel approach to wave energy generation. New owners Ecotricity - pioneers of wind power in Britain - are aiming for mass deployment in the next five years.

An inventor has been awarded for his novel technology for generating energy with waves.

Scientists have developed a piezoelectric speaker that can playback the full frequency range of dolphin sounds, getting us closer to human-dolphin communication.

Wave power is a promising source of clean energy, but it is usually overlooked because wind and solar power are farther along.

The wave glider created by Iquid Robotics has passed quite a test for robustness. It coasted through the superstorm and provided real time weather data nonstop.

Wave power is the oft-forgotten cousin of solar and wind power. It has huge potential, but it is not quite as far along as the better known sources of clean power, so it tends to be overlooked.

The company says this system is simpler than other wave devices that need to be finely tuned to the waves to pick up their energy.

A student at Wake Forest University is testing wave energy technology for capturing the power in pool laps.

This promising source of clean energy is facing an uphill battle.

The agency is offering up open source modeling software to scientists, engineers and garage inventors too.

The Norwegian ship has been given a new clean energy life.

The new wave energy harvester will be utility scale and tough enough to need little maintenance, even in rough seas.

The wave energy generators would help to both generate power and dissipate the power of the waves crashing against the shore.

The teen has been building the DIY microwave, hoping to solve many cooking problems with one device.

The fruit company is spreading its clean energy bets across many sources.

Like a gadget from a superhero's gizmo-kit, two engineering students have invented a device to battle blazes with noise – water and toxic chemicals not required.

With temperatures soaring even before the calendar turns to June, the shade of the solar tree will be as welcome as its many functions

The first affordable microwave changed the way we cooked- for a while, anyway

Exposed by low tide and bereft of a cooling breeze, the mollusks overheated to the point of cooking.

This novel wave energy technology can deliver large volumes of high pressure water ashore for desalination or power production (or both).

This system could produce 3,500 gallons of clean water per day, at half the cost of current desalination methods, using just the motion of the waves to power the Reverse Osmosis process.

Lake Michigan froze over during the polar vortex, so I walked on water.

The French consider AC to be unhealthy. Will they change their minds in the face of a changing climate?

Moody's Analytics' Mark Zandi worries businesses may reopen too soon.

Moody's Analytics' Mark Zandi worries businesses may reopen too soon and create another spike in coronavirus cases.

Kare Schultz, CEO of Teva Pharmaceuticals, joins "Squawk on the Street" to discuss the coronavirus pandemic and potential treatments.

The surprise detection of a radio burst from a neutron star in our galaxy might reveal the origin of a bigger cosmological phenomenon

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A choice between lives and livelihoods? Iranian authorities have gradually been easing confinement since April 11, this in a nation hit early and hard by Covid-19. Did they have to reopen mosques? Could they afford to keep the sanctions-squeezed country in lockdown and risk a complete collapse of the economy or does opening it up make it worse? Already there are signs of a resurgence of coronavirus. The show features Sanam Shantyaei's exclusive interview with a frontline medic in Tehran while Esfandyar Batmanghelidj and Behnam Ben Taleblu disagree on whether the US should ease sanctions.