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"Many might be alarmed to learn of a homemade nuclear reactor being built next door. But what if this form of extreme DIY could help solve the world's energy crisis? "

Join Bill Nye as he delves into the Greatest Discoveries in Biology. This program explains how the early use of microscopes and Anton Van Leeuwenhock's accidental discovery set the stage for studying microorganisms. It explores 19th century research breakthroughs and covers cell division, sex cell division, and cell differentiation. Learn how the discovery of mitochondria has helped us understand reproduction, ancestral lines, and cancer; how cells convert sugars, fats, and proteins into energy in the Krebs Cycle; and how they communicate through neurotransmitters and hormones. Explore the process of photosynthesis and how the discovery of the ecosystem process bridged biology with physics, chemistry, and other fields of science that describe the environment.

Bill Nye and the Discovery Channel give you the greatest discoveries in science. Earth is always changing, and Earth's species must continually adapt. Host Bill Nye gives an inside look at planet Earth, from its inner core to its protective magnetic field. Discover how earthquakes and volcanoes help explain plate tectonics and the dynamic geology of oceans and continents. Learn how the Earth's atmosphere gives scientific insight about weather and climate, and look at forms of radiation and the potential dangers from harmful gases and geologic changes.

Host Bill Nye looks back over the past two centuries, in which chemistry has brought us from a time when atoms were a hypothesis to an age where scientists may be able to combine particles on the atomic level into micro-machines. Learn how electricity transforms chemicals, elements can combine into more complex molecules, and the combination of nonliving substances produced organic compounds that led to pharmacology. Nye examines the second half of the 19th century, a time dominated by discoveries relating to light, electrons, radioactivity, and the periodic table of the elements as well as 20th century advances in science.

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Saturn's tiny, icy moon Enceladus has recently been visited by NASA's Cassini orbiter on several very close approaches - once coming within a mere 25 kilometers (15 miles) of the surface. Scientists are learning a great deal about this curious little moon. Only about 500 kilometers wide (310 miles), it is very active, emitting internal heat, churning its surface, and - through cryovolcanism - ejecting masses of microscopic ice particles into Saturnian orbit.

"Learn how to safely open a D cell, and remove its sweet, sweet chemical innards. D cells are favorable as their large size facilitates investigation, and they contain the greatest magnitude of useable chemicals."

It was the year we learned of a spectacular smash-up in space, and scientists working on the world's biggest physics experiment delighted at collisions of an entirely different sort. There were shockwaves, too, in Copenhagen, as the summit failed to reach a consensus on tackling climate change, instead merely noting a deal struck by major powers including the US and China. The BBC's science reporter Paul Rincon looks back at the twists and turns of a year in science and the environment.

We will teach you to identify 3 constellations, 2 stars, and 1 planet. Betelgeuse will also teach you how to navigate at night using the stars.

Clever and a little creative use of bad math.

"Today's math curriculum is teaching students to expect -- and excel at -- paint-by-numbers classwork, robbing kids of a skill more important than solving problems: formulating them. At TEDxNYED, Dan Meyer shows classroom-tested math exercises that prompt students to stop and think."