The 33 engines of the rocket’s booster stage had begun to ignite during Thursday’s launch attempt, but were then shut down. SpaceX will try again on another day.

A new book sheds light on President Trump’s affinity for fossil fuels.

As wildfires intensify, threatening more people, a nonprofit is studying how to rethink homes and neighborhoods to prevent catastrophe.

The new pills can lower cholesterol levels far below what can be achieved with statins, clinical trials have shown.

Officials in Santa Clara County began knocking on doors on Monday to collect potentially infested plants sold at some Costco stores.

Days that are both extremely hot and polluted come with higher risks of respiratory ailments and other health hazards.

Physicists have debated which way a submerged sprinkler sucking in water would spin. Careful experiments provide an answer.

Scientists hoped for years to make a machine that could emulate the movements of diving birds, such as puffins, and offer an affordable, unobtrusive way to monitor fragile marine ecosystems. A team of researchers at M.I.T. has been able to create such a waterproof winged robot, according to a study published July 9 in the journal Science.

It is only the fifth new African monkey identified as a new species in the past 75 years.

A New Jersey couple helped scientists uncover the makeup of an unusual asteroid after it fell into their bedroom.

Some gun violence experts are skeptical. But the research raises questions of whether there’s a cause-and-effect relationship and if so, what’s behind it.

The ruins of a 2,400-year-old complex suggest that, to the Greeks of antiquity, Homer’s protagonist was not just a character in a poem but a figure of genuine devotion.

The remains of a 12-and-a-half-foot-tall Tyrannosaurus rex, known as Gus, were sold on Tuesday by Sotheby’s in New York. The sale makes Gus the most valuable prehistoric specimen ever sold on the commercial market.

Native American tribes and environmental groups are expected to challenge the move to shrink the Bears Ears and Grand Staircase-Escalante National Monuments.

Executives unhappy with the agency donated and lobbied President Trump directly. Major companies have already begun to prepare and ship new products.

Inspired by the physical feats of diving birds, researchers have created a robot that can plunge into the water and flap back into the air.

It’s the first time a sugar molecule has been detected in interstellar space. The discovery provides tantalizing new clues into how life may have arisen on Earth.

Roger Worthington is helping to lead a $50 billion lawsuit against oil producers. This week he’ll face powerful critics in Congress.

Residents fear that the Trump administration’s plans to build a border wall will threaten the region’s spectacular starry skies.

The patient had traveled to the Democratic Republic of Congo, the health ministry said. Workers are racing to trace those who may have had contact.