Each week we uncover the most interesting and informative articles from around the world, here are 10 of the coolest stories in science this week.

Black holes may not have singularities at their center. Instead, the matter they suck in may be spit out across the universe at some time in the future, a new theory suggests.
Black holes may not have singularities at their center. Instead, the matter they suck in may be spit out across the universe at some time in the future, a new theory suggests.
Credit: Shutterstock

Black holes are among the most mysterious places in the universe; locations where the very fabric of space and time are warped so badly that not even light can escape from them. According to Einstein's theory of general relativity, at their center lies a singularity, a place where the mass of many stars is crushed into a volume with exactly zero size. However, two recent physics papers, published on Dec.10 in the journals Physical Review Letters and Physical Review D, respectively, may make scientists reconsider what we think we know about black holes. Black holes might not last forever, and it's possible that we've completely misunderstood their nature and what they look like at the center, according to the papers. [Read more about the mystery]

In a recent study, scientists compared the skull of Little Foot (shown here) with that of other hominins.
In a recent study, scientists compared the skull of Little Foot (shown here) with that of other hominins.
Credit: Photo courtesy of the University of the Witwatersrand

The brain of one of the oldest Australopithecus individuals ever found was a little bit ape-like and a little bit human. [Read more about the cousin.]

Both the Santa story and consumer culture promote the ideal of wish-fulfillment, but parents can model adaptability and a healthy understanding of limitations by supporting children through disappointment.
Both the Santa story and consumer culture promote the ideal of wish-fulfillment, but parents can model adaptability and a healthy understanding of limitations by supporting children through disappointment.
Credit: Shutterstock

Disappointment is a natural human emotion that occurs after a perceived failure. For our young children, this perceived failure can look like not getting the toy they wanted, not being invited to a classmate's birthday party or losing their favorite stuffed animal. [Read more about the emotions.]

A series of ultrasound images shows a shark embryo swimming from one uterus to another.
A series of ultrasound images shows a shark embryo swimming from one uterus to another.
Credit: Ethology

If you've given birth, you're likely familiar with the strange sensation of a fetus kicking in the womb. Now, try to imagine the feeling of that fetus deciding it was bored with your uterus, flipping itself around, and swimming into another one. [Read more about the meals.]

The fossil of the world's oldest flowering plant (left) with an illustration of what it might have looked like some 174 million years ago (right).
The fossil of the world's oldest flowering plant (left) with an illustration of what it might have looked like some 174 million years ago (right).
Credit: Fu et al., 2018/CC BY 4.0 license; NIGPAS

Dinosaurs that lived during the early Jurassic period could stop and smell the flowers if they so desired, according to a new study that describes the oldest fossil flower on record. [Read more about the flower.]

The newly identified dinosaur <em>Saltriovenator zanellai</em> was found in the Italian Alps.
The newly identified dinosaur Saltriovenator zanellai was found in the Italian Alps.
Credit: Davide Bonadonna

Paleontologists have excavated a mighty meat-eating, four-fingered dinosaur from an unexpected spot: the Italian Alps. [Read more about the survival.]

Potter's body was encased in polyvinyl alcohol prior to freezing.
Potter's body was encased in polyvinyl alcohol prior to freezing.
Credit: Lynn Johnson/National Geographic

Susan Potter knew before she died that she, or at least her body, would make history: Not only would hers be the first diseased cadaver (and one containing a titanium hip) to be frozen, sliced up and digitized for all to study, but she also came with a detailed backstory. [Read more about the donation.]

A Costa Rican river anole recently demonstrated an ability that was previously unknown in lizards.
A Costa Rican river anole recently demonstrated an ability that was previously unknown in lizards.
Credit: Smithsonian Channel

Lizards can't breathe underwater — or can they?

Footage of a river anole that was recently filmed in Costa Rica revealed that the species — Anolis oxylophus — possesses a highly unusual ability. The anoles breathe stored oxygen while underwater, something that has never been seen or documented before in lizards. [Read more about the feat.]

Artist's concept of the newly discovered object 2018 VG18, nicknamed Farout, which researchers think is likely a pinkish dwarf planet. At 120 AU, the object is the farthest body ever found in the solar system.
Artist's concept of the newly discovered object 2018 VG18, nicknamed Farout, which researchers think is likely a pinkish dwarf planet. At 120 AU, the object is the farthest body ever found in the solar system.
Credit: Roberto Molar Candanosa/Carnegie Institution for Science

A newly discovered object is the most-distant body ever observed in the solar system — and the first object ever found orbiting at more than 100 times the distance from Earth to the sun. [Read more about the object.]

Located atop Mount Padang in West Java, the structure is topped by an archaeological site that holds rows of ancient stone pillars.
Located atop Mount Padang in West Java, the structure is topped by an archaeological site that holds rows of ancient stone pillars.
Credit: Danny Hilman Natawidjaja

An enormous pyramid-like structure in Indonesia that may represent the remains of an ancient temple hid underground for thousands of years. [Read more about the discovery.]

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