People keep finding weird crocs in Florida. Now we know what they are: Nile crocodiles.

Florida is famous for its wildlife.

Bald cypress trees and a great egret in Everglades National Park. Photo from National Park Service/Wikimedia Commons.


Southern Florida is home to the Everglades, manatees, and Florida panthers, not to mention a staggering menagerie of plants, fish, birds, and invertebrates.

But something larger and more dangerous has been lurking in its swamps.

A Nile crocodile in a French zoo. Photo from Alain Jocard/AFP/Getty Images.

Since at least the year 2000, people in southern Florida have been reporting weird-looking alligators and crocodiles. Southern Florida does have both alligators and crocodiles, but these — the ones people were calling about — seemed ... unusual.

Well, for the past few years, some of the people responding to these calls were scientists. They captured three of these animals (at least once right off someone's porch!) and, curious about these strange-looking gators, tested the animals' DNA.

What they found was that these aren't alligators at all. Nor are they the native American crocodile. No, these were Nile crocodiles.

Photo by Tim Muttoo/Wikimedia Commons.

Yes, as in the Nile River. Yes, as in the one in Africa.

DNA reports show that the three animals all shared similar DNA profiles, which suggests they all came from the same source and that all three have ties back to croc populations in South Africa.

There was no evidence that the Nile crocodiles were an established population — that is to say, they didn't find any baby crocs — but where there are three, there's probably more.

"The odds that the few of us who study Florida reptiles have found all of the Nile crocs out there is probably unlikely," study author Kenneth Krysko said in a press release.

Nile crocs are serious business.

A Nile crocodile in a French zoo. Photo from Guillaume Souvant/AFP/Getty Images.

Adult Nile crocodiles can grow to 16-20 feet long and weigh as much as a car. For comparison, the American alligator, which is native to Florida, usually grows just 10-14 feet long.

I never thought I'd have to say that a 14-foot-long reptile predator was small!

So what the heck are these things doing in Florida?! It's probably due to the exotic pet trade.

People sometimes keep big, exotic animals like crocodiles as either pets or attractions. But if the animals escape — or are deliberately released — they can get into the wild and establish a home for themselves.

These crocs aren't the first invasive species to hit Florida. But they may be the biggest.

More than 500 species of non-native fish and wildlife have invaded Florida, including monkeys, giant Burmese pythons, and poisonous lionfish.

Though the lionfish looks pretty, its voracious appetite and lack of predators has made it one of the Caribbean's most wanted. Photo by Alexander Vasenin/Wikimedia Commons.

But Nile crocodiles would be one of the largest and potentially most dangerous. Back in Africa, Nile crocodiles are apex predators, eating just about anything they can catch, from water buffalo to zebras.

This could be bad for native crocs as well, say the scientists. Many alligator and crocodile species can breed with each other, meaning the genetics of our native American crocodiles could start to merge with the Nile crocs.

"My hope as a biologist is that the introduction of Nile crocodiles in Florida opens everyone's eyes to the problem of invasive species that we have here in our state," said Krysko. "Now here's another one, but this time it isn't just a tiny house gecko from Africa."

Luckily, people are working hard to protect our environments from invasive species.

Some programs are designed to help prevent the introduction of invasive species. Exotic pet amnesty programs, for example, give people who can't care for their exotic pets a place to let them go without releasing them into the wild.

Other programs are designed to reduce the impact of invasive species that have already been introduced. For instance, since 2013, the Florida Fish and Wildlife Conservation Commission has sponsored a live-capture hunt for giant snakes called the Python Challenge.

The 2013 Python Challenge in Davie, Florida. Photo by Joe Raedle/Getty Images.

There are even campaigns encouraging people to chow down on invaders in an effort to keep their numbers in check.

Invasive species can be a major problem. But thanks to many people dedicated to monitoring and preventing their release, we can push back against the invaders.

As of now, the Nile croc population hasn't exploded in southern Florida. Hopefully, as more people learn about the dangers of invasive species like this one, we can keep the pressure on the pet trade and other avenues by which these animals arrive and keep them out of places they don't belong.

Everyone can all use a little lift at the end of the week, and we've collected some of this week's best stories to provide just such a pick-me-up. Here are 10 things we want to share, just because they made us so darn happy.

1. Introducing Lila, the U.S. Capitol Police's first emotional support dog.

After the traumatic experiences of January 6th, Capitol Police officers could definitely use some extra support. Lila, a two-year-old black lab, will now serve as the department's first full-time emotional support dog. Look at that sweet face!

2. Speaking of the Capitol, take a look at this week's gorgeous solar eclipse behind the dome.

NASA Administrator Bill Nelson shared the stunning "ring of fire" image on Twitter. Always a treat when nature gives us a great show.


3. Colorado sees its first wild wolf pups in six decades.

In the 1940s, the gray wolf was eradicated in Colorado by trappers and hunters, with the support of the federal government. Whoops. This week, Colorado Parks and Wildlife has announced the first evidence of wild wolf breeding in the state, a sign of hope for the endangered species. Read more about the discovery here.

Photo by M L on Unsplash


4. 30-year-old singer with terminal cancer amazed and inspired with her performance on America's Got Talent.

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Everyone can all use a little lift at the end of the week, and we've collected some of this week's best stories to provide just such a pick-me-up. Here are 10 things we want to share, just because they made us so darn happy.

1. Introducing Lila, the U.S. Capitol Police's first emotional support dog.

After the traumatic experiences of January 6th, Capitol Police officers could definitely use some extra support. Lila, a two-year-old black lab, will now serve as the department's first full-time emotional support dog. Look at that sweet face!

2. Speaking of the Capitol, take a look at this week's gorgeous solar eclipse behind the dome.

NASA Administrator Bill Nelson shared the stunning "ring of fire" image on Twitter. Always a treat when nature gives us a great show.


3. Colorado sees its first wild wolf pups in six decades.

In the 1940s, the gray wolf was eradicated in Colorado by trappers and hunters, with the support of the federal government. Whoops. This week, Colorado Parks and Wildlife has announced the first evidence of wild wolf breeding in the state, a sign of hope for the endangered species. Read more about the discovery here.

Photo by M L on Unsplash


4. 30-year-old singer with terminal cancer amazed and inspired with her performance on America's Got Talent.

Keep Reading Show less
True

Each year, an estimated 1.8 million people in the United States are affected by cancer — most commonly cancers of the breast, lung, prostate, and blood cancers such as leukemia. While not everyone overcomes the disease, thanks to science, more people are surviving — and for longer — than ever before in history.

We asked three people whose lives have been impacted by cancer to share their stories – how their lives were changed by the disease, and how they're using that experience to change the future of cancer treatments with the hope that ultimately, in the fight against cancer, science will win. Here's what they had to say.

Celine Ryan, 55, engineer database programmer and mother of five from Detroit, MI

Photo courtesy of Celine Ryan

In September 2013, Celine Ryan woke up from a colonoscopy to some traumatic news. Her gastroenterologist showed her a picture of the cancerous mass they found during the procedure.

Ryan and her husband, Patrick, had scheduled a colonoscopy after discovering some unusual bleeding, so the suspicion she could have cancer was already there. Neither of them, however, were quite prepared for the results to be positive -- or for the treatment to begin so soon. Just two days after learning the news, Ryan had surgery to remove the tumor, part of her bladder, and 17 cancerous lymph nodes. Chemotherapy and radiation soon followed.

Ryan's treatment was rigorous – but in December 2014, she got the devastating news that the cancer, once confined to her colon, had spread to her lungs. Her prognosis, they said, was likely terminal.

But rather than give up hope, Ryan sought support from online research, fellow cancer patients and survivors, and her medical team. When she brought up immunotherapy to her oncologist, he quickly agreed it was the best course of action. Ryan's cancer, like a majority of colon and pancreatic cancers, had been caused by a defect on the gene KRAS, which can result in a very aggressive cancer that is virtually "undruggable." According to the medical literature, the relatively smooth protein structure of the KRAS gene meant that designing inhibitors to bind to surface grooves and treat the cancer has been historically difficult. Through her support systems, Ryan discovered an experimental immunotherapy trial at the National Institutes of Health (NIH) in Bethesda, MD., and called them immediately to see if she was eligible. After months of trying to determine whether she was a suitable candidate for the experimental treatment, Ryan was finally accepted.

The treatment, known as tumor-infiltrating lymphocyte therapy, or TIL, is a testament to how far modern science has evolved. With this therapy, doctors remove a tumor and harvest special immune cells that are found naturally in the tumor. Doctors then grow the cells in a lab over the next several weeks with a protein that promotes rapid TIL growth – and once the cells number into the billions, they are infused back into the patient's body to fight the cancer. On April 1, 2015, Ryan had her tumor removed at the NIH. Two months later, she went inpatient for four weeks to have the team "wash out" her immune system with chemotherapy and infuse the cells – all 148 billion of them – back into her body.

Six weeks after the infusion, Ryan and Patrick went back for a follow-up appointment – and the news they got was stunning: Not only had no new tumors developed, but the six existing tumors in her lungs had shrunk significantly. Less than a year after her cell infusion, in April 2016, the doctors told Ryan news that would have been impossible just a decade earlier: Thanks to the cell infusion, Ryan was now considered NED – no evaluable disease. Her body was cancer-free.

Ryan is still NED today and continuing annual follow-up appointments at the NIH, experiencing things she never dreamed she'd be able to live to see, such as her children's high school and college graduations. She's also donating her blood and cells to the NIH to help them research other potential cancer treatments. "It was an honor to do so," Ryan said of her experience. "I'm just thrilled, and I hope my experience can help a lot more people."

Patrice Lee, PhD, VP of Pharmacology, Toxicology and Exploratory Development at Pfizer

Photo courtesy of Patrice Lee

Patrice Lee got into scientific research in an unconventional way – through the late ocean explorer Jacques Cousteau.

Lee never met Cousteau but her dreams of working with him one day led her to pursue a career in science. Initially, Lee completed an undergraduate degree in marine biology; eventually, her interests changed and she decided to get a dual doctoral degree in physiology and toxicology at Duke University. She now works at Pfizer's R&D site in Boulder, CO (formerly Array BioPharma), leading a group of scientists who determine the safety and efficacy of new oncology drugs.

"Scientists focused on drug discovery and development in the pharmaceutical industry are deeply committed to inventing new therapies to meet unmet needs," Lee says, describing her field of work. "We're driven to achieve new medicines and vaccines as quickly as possible without sacrificing safety."

Among the drugs Lee has helped develop during her career, including cancer therapies, she says around a dozen are currently in development, while nine have received FDA approval — an incredible accomplishment as many scientists spend their careers without seeing their drug make it to market. Lee's team is particularly interested in therapies for brain metastases — something that Lee says is a largely unmet need in cancer research, and something her team is working on from a variety of angles. "Now that we've had rapid success with mRNA vaccine technology, we hope to explore what the future holds when applying this technology to cancers," Lee says.

But while evaluating potential cancer therapies is a professional passion of Lee's, it's also a mission that's deeply personal. "I'm also a breast cancer survivor," she says. "So I've been on the other side of things and have participated in a clinical trial."

However, seeing how melanoma therapies that she helped develop have affected other real-life cancer patients, she says, has been a highlight of her career. "We had one therapy that was approved for patients with BRAF-mutant metastatic melanoma," Lee recalls. "Our team in Boulder was graced by a visit from a patient that had benefited from these drugs that we developed. It was a very special moment for the entire team."

None of these therapies would be available, Lee says without rigorous science behind it: "Facts come from good science. Facts will drive the development of new drugs, and that's what will help patients."

Chiuying "Cynthia" Kuk (they/them) MS, 34, third-year medical student at Michigan State University College of Human Medicine

Photo courtesy of Cynthia Kuk

Cynthia Kuk was just 10 years old when they had a conversation that would change their life forever.

"My mother, who worked as a translator for the government at the time, had been diagnosed with breast cancer, and after her chemotherapy treatments she would get really sick," Kuk, who uses they/them pronouns, recalls. "When I asked my dad why mom was puking so much, he said it was because of the medicine she was taking that would help her get better."

Kuk's response was immediate: "That's so stupid! Why would a medicine make you feel worse instead of better? When I'm older, I want to create medicine that won't make people sick like that."

Nine years later, Kuk traveled from their native Hong Kong to the United States to do exactly that. Kuk enrolled in a small, liberal arts college for their Bachelor's degree, and then four years later started a PhD program in cancer research. Although Kuk's mother was in remission from her cancer at the time, Kuk's goal was the same as it had been as a 10-year-old watching her suffer through chemotherapy: to design a better cancer treatment, and change the landscape of cancer research forever.

Since then, Kuk's mission has changed slightly.

"My mom's cancer relapsed in 2008, and she ended up passing away about five years after that," Kuk says. "After my mom died, I started having this sense of urgency. Cancer research is such that you work for twenty years, and at the end of it you might have a fancy medication that could help people, but I wanted to help people now." With their mother still at the forefront of their mind, Kuk decided to quit their PhD program and enter medical school.

Now, Kuk plans to pursue a career in emergency medicine – not only because they are drawn to the excitement of the emergency room, but because the ER is a place where the most marginalized people tend to seek care.

"I have a special interest in the LGBTQ+ population, as I identify as queer and nonbinary," says Kuk. "A lot of people in this community and other marginalized communities access care through the ER and also tend to avoid medical care since there is a history of mistreatment and judgement from healthcare workers. How you carry yourself as a doctor, your compassion, that can make a huge difference in someone's care."

In addition to making a difference in the lives of LGBTQ+ patients, Kuk wants to make a difference in the lives of patients with cancer as well, like their mother had.

"We've diagnosed patients in the Emergency Department with cancer before," Kuk says. "I can't make cancer good news but how you deliver bad news and the compassion you show could make a world of difference to that patient and their family."

During their training, Kuk advocates for patients by delivering compassionate and inclusive care, whether they happen to have cancer or not. In addition to emphasizing their patient's pronouns and chosen names, they ask for inclusive social and sexual histories as well as using gender neutral language. In doing this, they hope to make medicine as a whole more accessible for people who have been historically pushed aside.

"I'm just one person, and I can't force everyone to respect you, if you're marginalized," Kuk says. "But I do want to push for a culture where people appreciate others who are different from them."