Light reflecting off the round rim creates a mathematically significant shape in this coffee cupSarah Hart The following is an…
Heavy periods may result in time off school and worse exam grades if girls lack the products they needCaiaimage/Chris Ryan/iStockphoto/Getty…
Sufficiently advanced aliens would be able to capture vast quantities of energy from their star using a massive structure called…
People across the UK and US may glimpse a special light show tonightMarc Hilton/iStockphoto/Getty Images The aurora borealis, or northern…
Smoke rings are similar to the vortices created in laser lightYevhen Rychko / Alamy Stock Photo Short pulses from a…