Gill Hicks's story is one of compassion and humanity, emerging from the ashes of chaos and hate. A survivor of the London terrorist bombings on July 7, 2005, she shares her story of the events of that day -- and the profound lessons that...

Most animals keep their poop chutes on the opposite side of their body from where they eat. But that doesn’t mean it’s always the case, and bryozoans are great examples of how creative you can get with where you put your anus.

Paul Andersen starts with a brief description of the history of life. He then discusses the seven characteristics of life and why viruses are not alive. He then describes the three domains in the current classification system and...

Nearly 350 species of fish have specialized anatomical structures that generate and detect electrical signals. Underwater, where light is scarce, electrical signals offer ways to communicate, navigate, find, and sometimes stun prey. But...

If we really want to address climate change, we need to make gender equity a reality, says writer and environmentalist Katharine Wilkinson. As part of Project Drawdown, Wilkinson has helped scour humanity's wisdom for solutions to draw...

Quantum mechanics is weird and seems a bit...complicated. But understanding it can help us to understand the universe.

It’s easy to imagine that our galaxy is basically frozen in time from the perspective of a human lifespan, but in fact, the Milky Way is incredibly dynamic and will undergo some pretty amazing changes in only a few decades!

The controversial history, present and future of the Nobel Prizes.

Who wants to be a biologist? Learn all about scientists who study life -- like where they do their jobs, the questions they ask, and the tools they use!

Sometimes it seems like the past favored large animals, but it turns out that each one on this list has a different reason for its size.

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Natural history is full of living things that were long thought to have gone extinct only to show up again, alive and well. Paleontologists have a word for these kinds of organisms: They call them Lazarus taxa.

Everybody loves dinosaurs, and we wouldn't know nearly as much as we do if it weren't for a person named Mary Anning.

Organ transplants aren’t new, but scientists are still making breakthroughs in transplant success rates and the sources of the organs.

It's possible life could form based on elements other than carbon, but they would look much different than the life we are used to.

What if immortality wasn't just the stuff of epic comic book stories? Is it scientifically possible to be immortal? In this series, Joy Lin tackles six superpowers and reveals just how scientifically realistic they can be to us mere...

After drinking a few glasses of water on a hot day, you might be struck with a sudden urge. Behind that feeling are two bean-shaped organs that work as fine-tuned internal sensors. Emma Bryce details how the incredible kidneys balance...

Everybody knows what anxiety feels like - it's annoying and counterproductive and apparently useless, so why does it exist? It turns out your anxiety isn't useless at all - it's a result of the sympathetic nervous system (in charge of...

What was the 2012 Nobel Prize in physics given for? Capturing a single photon of light!

Too often we think of air as empty space - but compared to a vacuum, air is actually pretty heavy. So, just how heavy is it? And if it's so heavy, why doesn't it crush us? Dan Quinn describes the fundamentals of air pressure and...

These fun looking sea slugs have a few unique features, not the least of which is the fact that they defend themselves by smelling like watermelon candies.

Scientists have discovered viruses that infect viruses... virusception, if you will. Does this mean viruses qualify as life yet? Or are they still hanging out in the misfits drawer with sporks and Pluto?

Would you like to spend all day thinking about dinosaurs? Well, some scientists do! Find out all about what it means to be a paleontologist!

In part 3 of our special series on human ancestry, we investigate how closely related we all really are. Basic math tells us that all humans share ancestors. But you'll be amazed at how recently those shared ancestors lived. Thanks to...

What is Energy? The short answer is EVERYTHING. But what does that mean? Let SciShow explain.