Science

We remember NASA's Challenger disaster: What led up to the mission, what went wrong, and its lasting impact.

Sherrill ordered state regulators to boost renewables and natural gas in light of rising electricity prices.

We look back at the first spacecraft landing on Mars in 1976, the Challenger tragedy in 1986, and the long-game Pluto mission launched in 2006. 

The EPA last year proposed changes to the definition of “waters of the United States,” leaving some Delaware wetlands vulnerable to development.

Water providers are removing toxic PFAS chemicals from drinking water, but current methods are energy intensive. Temple researchers are looking at alternative technologies.

The remnants of Hurricane Ida caused millions of dollars in damage to homes and led to the deaths of four people in Bucks and Montgomery counties.

A look at the science of designing a happier life — from reverse-engineering joy to moments of serendipity.

FEMA approved the city to join its Community Rating System, a program that rewards municipalities that take steps to reduce flood risk.

Delaware environmental regulators are calling for increased access to electric vehicles, and the protection of natural resources.

The whale was found Sunday on a ship at the Gloucester Marine Terminal, which is at the base of the Walt Whitman Bridge.

The latest baby African penguin, known only as 53, joins Oscar and Duffy as the latest additions to the aquarium’s African penguin colony.

Rising seas are drowning New Jersey wetlands. A new round of state climate funding aims to make them more resilient.

Concrete reabsorbs some of its carbon emissions over time. Alternative ingredients and 3D printing could help supercharge that by making the finished concrete more porous.

A look back at the cut-throat competition that led to the historic unveiling of the decoded human genome.

From its name to its biodiversity, the river offers a range of fun and unique qualities to consider before you vote by Jan. 16.