5 things to know about why Russia might invade Ukraine – and why the US is involved

Tonga eruption was so intense, it caused the atmosphere to ring like a bell

The big challenges for supply chains in 2022

From delta to omicron, here’s how scientists know which coronavirus variants are circulating in the US

Ghislaine Maxwell guilty in Epstein sex trafficking trial: What the case revealed about female sex offenders

State Department to pilot new program for refugees to attend college

What will 2022 bring in the way of misinformation on social media?

More than 950 U.S. flights canceled Monday after challenging holiday weekend

Hundreds of Christmas Eve flights canceled in U.S. as omicron variant impacts industry

What is Log4j? A cybersecurity expert explains the latest internet vulnerability, how bad it is and what’s at stake

Rapid tests play a crucial role in curbing COVID-19 infections – especially as people gather for the holidays

Omicron: evidence shows it evades immunity from earlier infection more than other variants

Here’s what scientists are doing right now to understand the new coronavirus variant

Why Biden’s threat to slap Russia with more sanctions is unlikely to deter Putin in Ukraine

The hunt for coronavirus variants: how the new one was found and what we know so far

Will omicron – the new coronavirus variant of concern – be more contagious than delta?

Nation's first case of omicron variant identified in California

Who’s in? Who’s out? The ethics of COVID-19 travel rules

Omicron: why the WHO designated it a variant of concern

Biden addresses Omicron strain: No 'additional measures'

The hunt for coronavirus variants: how the new one was found and what we know so far

The thousands of vulnerable people harmed by Facebook and Instagram are lost in Meta’s ‘average user’ data

Could oral antiviral pills be a game-changer for COVID-19?

Five things you need to know about the Glasgow Climate Pact