There are three types of color receptors in your eye: red, green and blue. But how do we see the amazing kaleidoscope of other colors that make up our world? Watch the lesson for the answer. Meanwhile, stay curious! View Full Lesson/Credits • Eco-friendly, high-quality, minimal waste• Unisex • 100% ring-spun cotton (heather colors contain polyester) • Baby-knit jersey • Shoulder-to-shoulder taping • Cover stitched and hemmed sleeves • Side-seamed

Today, about one-tenth of the world’s population are southpaws. Why are such a small proportion of people left-handed -- and why does the trait exist in the first place? Daniel M. Abrams investigates how the uneven ratio of lefties and righties gives insight into a balance between competitive and cooperative pressures on human evolution. View Full Lesson/Credits • Eco-friendly, high-quality, minimal waste • Unisex • 100% ring-spun cotton (heather colors contain polyester) • Baby-knit jersey • Shoulder-to-shoulder taping • Cover stitched and hemmed sleeves • Side-seamed

Honeybees are some of nature's finest mathematicians. Not only can they calculate angles and comprehend the roundness of the Earth, these smart insects build and live in one of the most mathematically efficient architectural designs around: the beehive. View Full Lesson/Credits • Eco-friendly, high-quality, minimal waste• Unisex • 100% ring-spun cotton (heather colors contain polyester) • Baby-knit jersey • Shoulder-to-shoulder taping • Cover stitched and hemmed sleeves • Side-seamed

Purchase a TED-Ed Loves You tote bag and you'll be helping TED-Ed share high-quality educational content with the world for free! Your messages of encouragement, and the stories you share about how you use TED-Ed animations and programs bolster our work and give us a glimpse of the impact we hope to have on the world. TED-Ed loves you, ju, dich, ty, tebe...all of you! You show us your , and we you back.• 100% certified organic cotton 3/1 twill• Dimensions: 16” x 14½” x 5”• Weight limit: 30lbs (13.6 kg)• Open main compartment

Purchase a TED-Ed Loves You tote bag and you'll be helping TED-Ed share high-quality educational content with the world for free! Your messages of encouragement, and the stories you share about how you use TED-Ed animations and programs bolster our work and give us a glimpse of the impact we hope to have on the world. TED-Ed loves you, ju, dich, ty, tebe...all of you! You show us your , and we you back.• 100% certified organic cotton 3/1 twill• Dimensions: 16” x 14½” x 5”• Weight limit: 30lbs (13.6 kg)• Open main compartment

Use this notebook for class notes, doodling, or jotting down your big (or small) ideas. Or add it to your ever-growing pile of too-nice-to-use journals.• Covers with soft-touch coating• Cover weight: 10.38 oz/yd² (352 g/m²)• Page weight: 2.62 oz/yd² (89 g/m²)• Metal wire-o binding• 140 dotted pages• Size: 5.25′′ × 8.25′′ (13 × 21 cm)• Blank product sourced from the US