Teen who received life-saving transplant reacts to medical breakthroughs using pig organs

A human donor saved the life of 15-year-old Wilfre Mercedes. Today, after doctors successfully transplanted a pig's heart into a human patient, Mercedes is hopeful thousands of others on transplant waiting lists can go on living, just like he did.

Pfizer: Omicron-specific COVID-19 vaccine human trials to begin late January

Pfizer confirmed it plans to start human trials of its omicron-specific COVID-19 vaccine later this month, potentially making it available to the public as soon as March.

US surgeons perform 1st transplant of pig heart into human patient

U.S. doctors have transplanted a pig heart into a patient in a last-ditch effort to save his life — a first for medical science.

NASA aces James Webb telescope sunshield unfolding

NASA has aced the most complicated, critical job on its newly launched space telescope: unrolling and stretching a sunshade the size of a tennis court.

Pluto should be classified as a planet again, scientists argue

A new study is reigniting the debate over Pluto’s status as a dwarf planet — a clash that has been going for 15 years.

Largest cluster of rogue planets discovered by astronomers

A team of astronomers has discovered nearly 70 rogue planets— cosmic objects that resemble a planet but do not orbit a star.

James Webb Space Telescope, world’s largest and most powerful, launched Christmas morning

NASA's James Webb Space Telescope launched successfully early Christmas morning from French Guiana on South America’s northeastern coast, riding a European Ariane rocket into the sky.

James Webb Space Telescope: How to watch launch of Hubble's successor

The James Webb Space Telescope, Hubble’s more powerful successor, is scheduled for liftoff on Christmas morning. Here’s how to watch.

‘Baby Yingliang’: Preserved fossilized dinosaur egg discovered in China

“Baby Yingliang” is a well-preserved fossilized dinosaur egg that has given scientists another link between prehistoric creatures and modern birds.

2021 Ursid meteor shower: Where, when to see the celestial event

The Ursid meteor shower happens every year and is considered a “low-key” affair because usually only between 5 and 10 meteors can be seen per hour, which is considered a small number.

Xenobots, world’s first living robots, can reproduce, scientists say

Scientists said xenobots are able to self-replicate and while they currently serve no purpose to the human race it could be the pathway in treating cancer and health issues.

Online group hopes for rescue of loon stuck on icy northern Minnesota lake

The plight of a loon unable to fly from a small circle of open water on an icy northern Minnesota lake has captured the attention of thousands of people online.