Regulators might want to take a beat before loosening marijuana laws.

New research: Marijuana changes heart structure

Heart Attacked

Marijuana can literally change a user's heart, enlarging its left ventricle and impairing function, according to a new study.

New Research: Marijuana Changes Heart Structure

Organic Chemistry

It also impairs the organ's ability to function.

Artificial human heart tissue beating like the real thing

These tiny pulses could one day save lives.

See lab-grown human heart tissue beat like a real heart

Get Pumped

German researchers have grown human heart tissue that expresses genes, responds to drugs, and beats just like the real thing.

See Lab-Grown Human Heart Tissue Beat Like a Real Heart

Researchers coaxed stem cells into forming pulsating heart tissue.

Next, they want to test it out in adults.

Doctors repair infants' damaged hearts with experimental procedure

Health & Medicine

An experimental procedure known as a mitochondrial transplant is helping doctors in Boston repair the damaged hearts of newborns.

The Digest: Doctors Repair Infants' Damaged Hearts With Experimental Procedure

They've developed a new way to get a heart to start beating again, no transplant required.

The Digest: Doctors Repair Infants’ Damaged Hearts With Experimental Procedure

Doctors Repair Infants' Damaged Hearts With Experimental Procedure

Instead of waiting for years on a donor list, patients with heart failure could have their hearts patched right up.

A stem cell patch could heal hearts damaged by cardiac arrest

U.K. Researchers are using stem cells to develop a "patch" that could help mend diseased and damaged hearts, eliminating the need for a transplant.

A Stem Cell Patch Could Heal Hearts Damaged By Cardiac Arrest

Billions of cells die during a heart attack. Regenerative medicine could bring them back.

Roses are red. Violets are blue. This AI-generated candy heart says “SWEAT POO.”

Crappy Valentine's Day, robots: AI is terrible at (human) seduction

Artificial Intelligence

A neural network that produces messages for candy hearts shows humans are still way ahead of robots when it comes to romance.

Crappy Valentine's Day, Robots: AI Is Terrible at (Human) Seduction

Robots are weird about expressing their love.

Crappy Valentine’s Day, Robots: AI Is Terrible at (Human) Seduction

Donor organs could remain viable for days instead of hours.

Hearts can now survive outside of the human body

Scientists in Sweden have created a device that is able to extend the time between organ donation and transplant from four hours to 12 or more.

Hearts Can Now Survive Outside of the Human Body

This could bring an end to people dying on the heart transplant waiting list. 

Hard Science

A genetic link with an ocean dweller may be the key to human organ regeneration.

New Evidence Indicates That Human Heart Regeneration May Be Possible

Need a new heart? In the future, you may be able to just grow it.

This dissolvable medical device can help keep your arteries clog-free

Enhanced Humans

New Breakthrough Treatment Could Offer Patients Help For Heart Disease

Heart-related disorder treatment has undergone a renaissance in the last few decades.

Advances in Robotics and 3D Printing Could Make Life-Saving Artificial Hearts a Reality

Donor waiting lists would become a thing of the past.

You know spinach is good for you. But did you know it can do this?

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