"After our primate cousins came down out of the trees, humans evolved on the savanna." You've heard that idea before, but is it true? The debate heats up — way up.
Sometimes we get so excited about new results that we just have to share them. It may be explaining a new piece of science or revisiting an older result of special significance. Science is all about celebrating discovery and understanding.
As those with Alzheimer's disease lose their memories, do they also lose their identities? Commentator Tania Lombrozo considers new research into traits seen as central to identity.
DNA. RNA. Amino acids. They all sound so abstract, so far from human reality. But it's the stuff from which you are constructed. Commentator Adam Frank shares a video that brings it all to life.
The relationships between big and small, near and far, then and now can be perplexing. Commentator Adam Frank says you can bring it all into focus by spending a little quality time with your toilet.
Born 450 years ago, Galileo remains an effective teacher today. Commentator Tania Lombrozo, for one, says his work illuminates the capacity of simple human thought to make sense of the world.
Ancient footprints discovered in Britain show that five individuals of mixed ages took a stroll together 800,000 years ago. Commentator Barbara J. King asks whether it's scientifically credible to consider these individuals a family.
Stephen Hawking wants to do away with black holes (as we know them) so he can save the two pillars of modern physics: general relativity and quantum mechanics. At stake is our understanding of the nature of space and time, and how matter affects, and is affected by, both.
When did it first become possible for life (as we know it) to appear in the cosmos? The answer seems obvious now. But it arrived, unexpectedly, in the shower. It's a story that tells us a lot about how creativity works in science.
The European Space Agency's Rosetta spacecraft is on track to rendezvous with a far-away comet and land a probe, a first. It will be a major turning point in our history and one that promises to address key questions such as the origin of water and life on Earth.
Dozens of thinkers have been asked to identify cherished scientific ideas that are ripe for retirement. Commentator Tania Lombrozo considers their answers and ends up questioning the wisdom of discarding worn-out scientific ideas.