Chris Hemsworth reconciles with his own limits

The "Thor" actor takes a personal look at the limits and abilities of the human body – and learns about a life-changing discovery – in the new Disney+ show "Limitless."

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What to know about the deadliest bird flu outbreak in history.

What to know about the deadliest bird flu outbreak in history.

Avian influenza poses a low risk to humans, experts say.

Senate poised to codify legal protection for same-sex marriage.

Senate poised to codify legal protection for same-sex marriage.

The Senate is poised to pass legislation Tuesday that would codify rights to same-sex and interracial marriage. #ABCNews #marriage #samesexmarriage #interracialmarriage #senate

World’s largest active volcano erupts in Hawaii - ABCNL.

World’s largest active volcano erupts in Hawaii - ABCNL.

Hawaii Gov.-elect Josh Green on how residents are staying safe as Mauna Loa erupts for the first time in 38 years. WATCH the ABC News Live Stream Here: SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOOK FOLLOW ABC News on TWITTER: #abc...

Authors Dave Barry and Michael Hill on the life and legacy of Art Buchwald l ABCNL.

Authors Dave Barry and Michael Hill on the life and legacy of Art Buchwald l ABCNL.

ABC News Live’s Kyra Phillips chats with the authors of “Funny Business,” a book honoring the life and political satire of Art Buchwald. WATCH the ABC News Live Stream Here:  SUBSCRIBE to ABC NEWS:  Watch More on  LIKE ABC News on FACEBOOK  FOLLOW...

Ukraine braces for new attacks on energy grid as Russia weaponizes winter - ABCNL.

Ukraine braces for new attacks on energy grid as Russia weaponizes winter - ABCNL.

ABC News’ Ines de la Cuetara reports from a warming shelter in Kyiv and how the latest U.S. aid package will help keep the lights and heat on in Ukraine. WATCH the ABC News Live Stream Here: SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FA...