How do El Niño and La Niña affect temperatures?
A massive heat wave is putting nearly 100 million people under intense triple-digit heat in the coming days. Here's how El Niño is contributing to the high temperatures.
Science
World just sweltered through its "hottest week on record," U.N. says
Researchers estimate that 61,672 people died due to the heat between June and September, with 11,600 deaths in one particularly intense week alone.
Be on the lookout for invasive, jumping "earthworms on steroids"
Wisconsin officials said they're investigating a possible infestation of the invasive species in a local compost site. Here's what to know about the jumping worms as they grow during the summer.
Harvard professor believes he's found fragments of alien technology
A Harvard professor believes he may have found fragments of alien technology from a meteor that landed in the waters off of Papua New Guinea in 2014.
Floods and landslides kill at least 50 as monsoon rains lash Pakistan
At least 8 children are among the dead in Pakistan, where scientists say climate change is fueling more intense monsoons.
Technology to eliminate PFAS moves forward
A new study has found that man-made toxic PFAS, known as "forever chemicals," may be found in 45% of the tap water in the U.S. However, a scientific company has developed a technology that uses an annihilator to completely eliminate PFAS within seconds. Mark Strassmann has more.
Earth sees third straight hottest day on record, though it's unofficial
One climate scientist called the marks more "evidence ... that global warming is pushing us into a hotter future."
How the heart shapes our perception of time
Two new studies have found that our heartbeat contributes to feeling like passing moments fly or drag. Experiments reported in "Current Biology" discovered that our perception of time passage expands and contracts within each heartbeat. Irena Arslanova, lead author of one of the studies and postdoctoral researcher at the University of London, joins CBS News to break down the findings.
Has pollution from fireworks made air quality worse?
Millions of Americans woke up the morning after Independence Day celebrations to air quality advisories across the U.S.
Shark attacks, sightings in New York and Florida put swimmers on high alert
At least 19 shark attacks have been reported in the United States this year.
DOJ releases huge new set of Epstein files with many mentions of Trump
The Justice Department early Tuesday released more than 11,000 additional documents and photos from the Jeffrey Epstein files.
Trump plows ahead with construction plans as conservation group seeks limits
President Trump has overhauled parts of the White House at a sprinter's pace with virtually no oversight, and it appears there is little standing in his way.
Supreme Court says Trump can't deploy National Guard to Chicago for now
President Trump invoked a law called Title 10 to bring members of the Illinois National Guard under federal service over the objections of state and local leaders.
2 dead, at least 20 hurt in Pennsylvania nursing home explosion, officials say
Two people were killed and at least 20 more were injured in an explosion at a nursing home in Bristol, Pennsylvania, officials said.
H-1B visa lottery system being replaced as DHS shifts priorities
The Department of Homeland Security says it's replacing its longstanding lottery system for H-1B work visas with an approach that prioritizes skilled, higher-paid foreign workers.
Ukraine peace plan might include demilitarized zones, Zelenskyy says
Ukrainian President Volodymyr Zelenskyy says a plan to end his country's war with Russia might include the establishment of demilitarized zones between Ukrianian and Russian forces.
Body of missing 9-year-old California girl Melodee Buzzard found, mother arrested
Authorities said Melodee Buzzard's body was found in a rural area outside of Cainville, Utah, and her mother was arrested Tuesday morning.
19 states and D.C. sue HHS over effort to ban transgender care for minors
The declaration issued by the U.S. Department of Health and Human Services called treatments like puberty blockers, hormone therapy and surgeries unsafe and ineffective for children and adolescents experiencing gender dysphoria.
NORAD tracks Santa in Christmas tradition. See the live map.
NORAD, the North American Aerospace Defense Command, tracks Santa's Christmas Eve flight around the world each year. Follow a live map of the tracker here.