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    ‘A life-changing experience’: Ed Dwight becomes oldest person to reach space

    01:44
  • Father and son co-pilots celebrate final flight together

    02:26
  • Hundreds of thousands without power in Houston days after deadly wind storm

    01:54
  • Sean ‘Diddy’ Combs issues apology after release of video that appears to show 2016 assault

    02:19
  • Search for Iran’s president underway after helicopter crash

    03:19
  • Biden gives commencement speech at Morehouse College

    00:49
  • Airbnb CEO says carbon monoxide detector mandate would be ‘very hard’

    02:26
  • Texas governor's pardon of man convicted of murdering protester draws outrage

    01:42
  • Powerful storm causes multiple deaths and widespread damage in Houston

    02:25
  • World's smallest pacemaker gives new hope to babies with heart defects

    01:43
  • Three U.S. Olympic champions to face off in same gymnastics event

    01:43
  • Video allegedly shows Sean Combs assaulting then-girlfriend in 2016

    02:46
  • Photo of upside-down American flag at Justice Alito's home sparks controversy

    01:58
  • Replacement statue of Jackie Robinson being crafted after theft

    01:52
  • New call for first responders to carry blood on ambulances

    03:32
  • Potential new drug for menopause shows promise, study shows

    01:49
  • Defense accuses Michael Cohen of lying on the stand in Trump's hush money trial

    03:47
  • Texas governor pardons former U.S. Army sergeant convicted of murdering protester

    00:56
  • Growing controversy over graduation speech by Kansas City Chiefs' kicker

    01:28
  • U.S. military anchors pier in Gaza for humanitarian aid

    01:44

New revolution in the construction industry? Skyscrapers made of wood

02:39

Builders are increasingly turning away from concrete and steel in favor of wood. In some cases, the material – known as mass timber – is even being used to construct skyscrapers. It’s becoming a sort of revolution: a 2021 study in the journal Sustainability found that mass timber buildings could reduce a building’s carbon emissions 22 to 50 percent compared to concrete. However, environmentalists worry about the cutting of primary and older forests, which would substitute one type of high carbon building material for another.