Neil deGrasse Tyson is blown away by a brilliant 2nd grader's question about black holes
His answer was pretty brilliant, too.

Neil deGrasse Tyson pleasantly shocked by second-grader's question.
In March 2009, PBS sponsored an event at The Palladium in St. Petersburg, Florida, called “Cosmic Quandaries with Dr. Neil deGrasse Tyson.” The event featured a Q and A with the famed astrophysicist and science communicator. Over 800 people attended the event and had the chance to ask Dr. Tyson a big question.
The most memorable moment of the night was when a young boy named Clayton, a second grader, asked Dr. Tyson a question that was as high-minded as scientists could ask and also something that young kids would ask each other on the playground: “Will like a black hole be able to suck in another black hole?”
Clayton’s question was so great that it surprised Dr. Tyson. “Good question, it's not past your bedtime or anything?” he joked after being challenged by the young boy. “You're in second grade, and you're thinking about colliding black holes. You belong in like 12th grade, okay? Go tell your teacher I said put you in 12th grade.”
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What would happen if 2 black holes collide?
It just so happens that a student at Dr. Tyson’s college did his PhD thesis on colliding black holes so he could answer the question, much to young Clayton’s delight. As a tribute to Clayton’s great question, Dr. Tyson admitted that there was a lot about the thesis that he didn’t understand.
Dr. Tyson said that the collision of two black holes would create an extraordinary disturbance in the fabric of space and time because 2 black holes enter each other’s event horizon. The event horizon is the opening to the black hole, where the pull is so intense that nothing, not even gravity, can escape. So what happens when 2 event horizons start pulling on each other? It opens up the opportunity for time travel.
Once Dr. Tyson said “time travel,” Clayton’s eyes lit up and he knew he had asked a dynamite question.

“They've studied what effect that has on the passage of time, and it turns out there is a path you can take around two moving black holes that haven't quite collided yet where you can end up in the past of when you started that journey,” Dr. Tyson explained. “So it's backwards time travel — according to calculations from Einstein's general relativity — is enabled by the severely distorted fabric of space and time.”
However, even though the collision of black holes makes time travel possible, you probably wouldn’t survive anywhere near the cosmic event. “So beyond that, you really want to sort of watch that from a distance,” Dr. Tyson joked. Ultimately, after the collision both black holes will come together to create a new black hole that’s twice as large.
The video is a wonderful example of how, when kids are allowed to let their incredible imaginations run wild, they can come up with ideas that impress even the world’s most famous astrophysicist. In an appearance on the “Impact Theory” podcast, Dr. Tyson remarked that one of the most important things we can do as adults is encourage children to be the little scientists they are.
"Kids are sources of chaos and disorder. Get over that fact. Where does the disorder come from? It’s because they are experimenting with their environment. Everything is new to them, everything,” he said. “Your job is less to instill curiosity than to make sure you don’t squash what is already there.
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A Generation Jones teenager poses in her room.Image via Wikmedia Commons
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An Irish woman went to the doctor for a routine eye exam. She left with bright neon green eyes.
It's not easy seeing green.
Did she get superpowers?
Going to the eye doctor can be a hassle and a pain. It's not just the routine issues and inconveniences that come along when making a doctor appointment, but sometimes the various devices being used to check your eyes' health feel invasive and uncomfortable. But at least at the end of the appointment, most of us don't look like we're turning into The Incredible Hulk. That wasn't the case for one Irish woman.
Photographer Margerita B. Wargola was just going in for a routine eye exam at the hospital but ended up leaving with her eyes a shocking, bright neon green.
At the doctor's office, the nurse practitioner was prepping Wargola for a test with a machine that Wargola had experienced before. Before the test started, Wargola presumed the nurse had dropped some saline into her eyes, as they were feeling dry. After she blinked, everything went yellow.
Wargola and the nurse initially panicked. Neither knew what was going on as Wargola suddenly had yellow vision and radioactive-looking green eyes. After the initial shock, both realized the issue: the nurse forgot to ask Wargola to remove her contact lenses before putting contrast drops in her eyes for the exam. Wargola and the nurse quickly removed the lenses from her eyes and washed them thoroughly with saline. Fortunately, Wargola's eyes were unharmed. Unfortunately, her contacts were permanently stained and she didn't bring a spare pair.
- YouTube youtube.com
Since she has poor vision, Wargola was forced to drive herself home after the eye exam wearing the neon-green contact lenses that make her look like a member of the Green Lantern Corps. She couldn't help but laugh at her predicament and recorded a video explaining it all on social media. Since then, her video has sparked a couple Reddit threads and collected a bunch of comments on Instagram:
“But the REAL question is: do you now have X-Ray vision?”
“You can just say you're a superhero.”
“I would make a few stops on the way home just to freak some people out!”
“I would have lived it up! Grab a coffee, do grocery shopping, walk around a shopping center.”
“This one would pair well with that girl who ate something with turmeric with her invisalign on and walked around Paris smiling at people with seemingly BRIGHT YELLOW TEETH.”
“I would save those for fancy special occasions! WOW!”
“Every time I'd stop I'd turn slowly and stare at the person in the car next to me.”
“Keep them. Tell people what to do. They’ll do your bidding.”
In a follow-up Instagram video, Wargola showed her followers that she was safe at home with normal eyes, showing that the damaged contact lenses were so stained that they turned the saline solution in her contacts case into a bright Gatorade yellow. She wasn't mad at the nurse and, in fact, plans on keeping the lenses to wear on St. Patrick's Day or some other special occasion.
While no harm was done and a good laugh was had, it's still best for doctors, nurses, and patients alike to double-check and ask or tell if contact lenses are being worn before each eye test. If not, there might be more than ultra-green eyes to worry about.