In Hawaii, coral is the basis of life. What happened to it after the Lahaina wildfire?

Abraham “Snake” Ah Hee rides the waves when the surf is high and dives for octopuses and shells when the water is calm. The lifelong resident of Lahaina, Hawaii, spends so much time in the ocean that his wife jokes that he needs to wet his gills. But these days, Ah Hee is concerned that … Read more

The heaviest pair of black holes ever seen weighs 28 billion times more than the sun

Two supermassive black holes found in collisionally created ‘fossil galaxies’ are so massive that they refuse to collide and merge. The discovery could explain why supermassive black hole mergers, while theoretically predicted, have never been observed over time. The supermassive black hole system is located in the elliptical galaxy B2 0402+379. Together, the two black … Read more

Astronaut Scott Kelly Gives Advice on Apple’s New Space Thriller ‘Constellation’

Scott Kelly recently returned to the International Space Station – during a trip to Berlin. The first American astronaut to spend more than 500 days off the planet, including nearly a year aboard the space station during his fourth and final spaceflight in 2016, Kelly was in Germany when he returned to his exotic home … Read more

A lone killer whale killed a great white killer whale in less than two minutes. Scientists say this could signal an ecological shift

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. A pair of working killer whales have been killing great white sharks along a stretch of the South African coastline since at least 2017, plundering the sharks’ nutrient-rich livers and throwing away the rest. Scientists … Read more

Richard Truly, space shuttle astronaut and NASA administrator, dies at 86

Richard “Dick” Truly, one of the first astronauts to fly the space shuttle and later led NASA as its eighth administrator, has died at the age of 86. Truly’s death on Tuesday (Feb. 27) was confirmed by the Association of Space Explorers, a professional organization for the world’s astronauts and cosmonauts, which considered Truly a … Read more

Here’s what can happen if you look at a solar eclipse the wrong way – and how to avoid it in April

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. On April 8, a stunning total solar eclipse will be visible to millions of people in Mexico, the United States and Canada. Astronomers are encouraging everyone on the trail to enjoy this rare sight for … Read more

Expansion of orchards in Canada’s wine country raises fears that an important wildlife corridor will be damaged

KELOWNA, British Columbia (AP) — Just below the fog line hanging over the central Okanagan Valley, rows of saplings for a cherry orchard expansion span the eastern stretch above Highway 33 on the outskirts of Kelowna in Canada’s wine country. New cherry varieties and climate change in interior British Columbia have allowed the fruit to … Read more

The ‘average’ revolutionized scientific research, but overreliance on it has led to discrimination and harm

When analyzing a set of data, one of the first steps many people take is to calculate an average. You can compare your height to the average height of the people where you live, or brag about the batting average of your favorite baseball player. But while the average can help you study a data … Read more

Mexico City’s 21 million residents are facing a severe water shortage

MEXICO CITY – North America’s most populous city is in the grip of a serious water crisis, as persistent drought and years of little rain push the already stressed system that supplies Mexico City with running water to its limits. More than 21 million residents in the Mexico City metropolitan area have suffered water shortages … Read more

Why NASA astronaut Jeanette Epps waited six extra years for her ISS space mission

NASA astronaut Jeanette Eps had an unusual path to space: She waited another six years to fly. Epps will ultimately fly to the International Space Station (ISS) no earlier than Saturday evening (March 2) on the SpaceX Crew-8 mission for NASA, flying the second long-duration mission by a Black woman in the orbiting complex. But … Read more