Objective: Determine which added material will make ice melt fastest Areas of science: Chemistry Difficulty: Medium intermediate Time required: 2–5 days Prerequisites: None Material availability: Readily available Cost: $20–$50 Safety:…

Rocket propellants (noun, “Rah-kit Pro-PELL-ents”) Rockets need two things to propel them forward. One is fuel. The other is a source of oxygen, or an oxidizer, to help burn that…

Some flowers may be using their pollinators as battlegrounds. Their secret weapon: built-in pollen catapults that help them outcompete rival flowers. In Brazil, red flowers called Hypenia macrantha have both…

More than 500 species of bacteria thrive in our mouths. But one type seems to play by its own rules. The cells of most bacteria reproduce by splitting in two. Corynebacterium…

It’s a pleasant summer morning. Across a field, a line of poplar trees sways in the breeze. Insects buzz and flit among the branches. Everything seems calm and peaceful. But…

Tyrannosaurus rex towered over many other dinosaurs. But the biggest of the king of the dinos may have been even heftier than fossils hint. Only around 80 fossil T. rex…

When you think of ancient pyramids, your mind probably goes to Egypt. Ancient Egyptians built these monuments as tombs for their kings, starting around 2700 B.C. Perhaps the most famous…

Monotreme (noun, “MON-oh-treem”) Monotremes are a unique group of mammals that lay eggs. Only five species of monotreme exist today. All live in either Australia or New Guinea. The platypus…

Some tadpoles seem to have a unique way to keep their watery cribs clean: They don’t poop for weeks! These baby Eiffinger’s tree frogs live in Taiwan and on the…