They spend more time and money in response to social challenges.

A natural Sistine chapel shows not religious paintings but images of sprawling tree trunks and fallen leaves.

Biodegradable soap-like molecule gives rodents some ability to move limbs.

One million new trees will join the urban landscape of New York City by the year 2017 to reduce air pollution, cool temperatures and help improve the city's long term sustainability, officials said Saturday.

HOBOKEN, N.J -- Two sailors cast off on the first of 1,000 planned days at sea Saturday in a bid to set a new world record.

Scientists have uncovered a protein in plant leaves that causes plants to flower. Changes in day length drive the flowering process.