Life's Little Mysteries: Science questions, answered

Researchers have made great strides to prevent deaths from fatal diseases, but the cures for some of them still elude us.

Earth's atmosphere is heavy, so why doesn't it weigh us down more?

Why aren't the solstices the coldest and hottest days of the year?

Gray hair is often a sign of aging, but is it possible to delay its advance or reverse the color change?

From delicate dandelions to mighty oak trees, millions of plants use seeds to reproduce. But where did the first seeds come from?

Coastlines are challenging to measure, but why?

The Concorde was the fastest commercial plane ever flown, but its speed came with a hefty price tag.

The number of known galaxies circling the Milky Way is increasing as we develop new powerful telescopes.

Quantum computers are here. But could we ever build a quantum laptop?

The Vikings' reputation for bloodlust compared to other medieval fighters may have been exaggerated over the years.