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Honeybees understand that "nothing" can be "something" that has numerical meaning, showing that they have a primitive grasp of the concept of zero.

That's according to a newly published study in Science, which shows that bees possess a mathematical ability once thought to exist only in dolphins, primates, birds and humans who are beyond the preschool years.

Suicide rates have increased in nearly every state over the past two decades, and half of the states have seen suicide rates go up more than 30 percent.

Suicide is a major public health issue, accounting for nearly 45,000 deaths in 2016 alone. That is why the Centers for Disease Control and Prevention in Atlanta decided to take a comprehensive look at suicides from 1999 to 2016.

The asteroid impact that ended the age of the dinosaurs also released so much carbon dioxide into the atmosphere that the planet warmed up by about 5 degrees Celsius — and the hot spell persisted for roughly 100,000 years.

That's according to a new study in the journal Science that offers a cautionary tale about how Earth's climate will react to the carbon dioxide that's being pumped into the atmosphere now by the burning of fossil fuels.

Chimps owned by the National Institutes of Health should be moved from research facilities to retirement sanctuaries unless that relocation is "extremely likely" to shorten their lives, a report issued Friday says.

"Chimpanzees should be relocated to the federal sanctuary system unless relocation would place the chimpanzee's life, safety, and welfare at extreme risk," says the report from a working group convened by the NIH to examine the safety of transferring chimps to retirement homes.

Kermit the Frog used to sing that it wasn't easy being green, but that isn't the case for some real-life lizards. They apparently find being green so easy that even their blood is green.

A study published Tuesday suggests seems that this lime-green blood has evolved independently several times in lizards.

Scientists are now trying to understand how these lizards might benefit from blood that's green. The answer could provide new insights into human illnesses like jaundice and malaria.

Ever since astronomers started to detect planets beyond our solar system, they've been trying to find another world just like Earth. And few years ago, they announced that they'd found a planet that was the closest match yet — Kepler-452b.

Trouble is, some astronomers now say it's not possible to know for sure that this planet actually exists.

Wednesday was the day astronomers said goodbye to the old Milky Way they had known and loved and hello to a new view of our home galaxy.

A European Space Agency mission called Gaia just released a long-awaited treasure trove of data: precise measurements of 1.7 billion stars.

If signs of life are found on a planet beyond our solar system sometime in the next decade, they'll most likely be on a planet discovered by a NASA satellite that's scheduled to launch on Monday.

The supermassive black hole lurking at the center of our galaxy appears to have a lot of company, according to a new study that suggests the monster is surrounded by about 10,000 other black holes.

For decades, scientists have thought that black holes should sink to the center of galaxies and accumulate there, says Chuck Hailey, an astrophysicist at Columbia University. But scientists had no proof that these exotic objects had actually gathered together in the center of the Milky Way.

Government health agencies have spent more than two decades shying away from gun violence research, but some say the new spending bill, signed by President Trump on Friday, will change that.

That is because, in agency instructions that accompany the bill, there is a sentence noting that the Centers for Disease Control and Prevention has the authority to conduct research on the causes of gun violence.

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