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Watch NASA test its new X-59 jet designed to go faster than the speed of sound

This next-generation plane is made to go faster than sound without producing a full sonic boom

A SpaceX rocket booster may be on track to hit the moon in August

While there is no immediate danger, this crash highlights that space junk is increasingly expanding out of lower-Earth orbit

Do octopus brains work like humans’—or is there another way to be smart?

Just like vertebrates, cephalopods—such as octopuses and squid—have elaborate brains. Neuroscientists are flocking to them for insights into how intelligence evolved.

Forest Service Research Labs Are Closing

ERIC NIILER AND JOHN STEMBER

A research lab in Washington State tracks ecological changes in a warming climate and provides scientific guidance for forest managers. It is one of 57 such facilities being shuttered.

Smog in Phoenix and Salt Lake City? The E.P.A. Is Blaming Asia.

HIROKO TABUCHI

The Trump administration says the cities shouldn’t be penalized for unhealthy air because pollution can blow in from abroad. Some experts say that’s preposterous.

3 Medical Routines That Older People May Not Need

PAULA SPAN

Some screenings and treatments no longer make sense for patients as they age. Researchers have just added a few more to the list.

Why the FDA rejected a ‘breakthrough’ melanoma drug

The FDA rejected the promising skin cancer drug RP1 twice, leaving many puzzled and worried about what this means for other drug approvals

J. Craig Venter, Scientist Who Decoded the Human Genome, Dies at 79

NICHOLAS WADE

A risk-taking outsider, he brought speed, competition and controversy to one of science’s biggest races.