mathematics This "Weird Units Calculator" can convert watts into T-Rex bites and lightsabers Thom Dunn
Boing Boing Gadgets Charge 5 devices at once while on the go with this 30,000mAh power bank, now under $75 Boing Boing's Shop
Science The weight of a kilogram changed overnight; the length of a second may be next David Pescovitz