Update: Forget Jeeves, ask Powerset

Horizon highlights – 6.27.08

Wanted: inner-city supermarkets

A fresh idea brings healthy food to low-income neighborhoods.

Space tourism is ready for takeoff

Video: The Lynx rocket can blast passengers into suborbit within a few minutes.

The web's best 'easter eggs'

Weeding out the hype

Mars’s big splat

An elevator into space

Scientists are investigating the construction of an elevator – a super-strong carbon ribbon reaching into orbit – that would transform the way we explore space, reducing the cost and the risks.

New pieces in the climate-change puzzle

Studies of forests and deserts yield new insight into how much carbon dioxide those areas can absorb.

Dubai’s twirling tower

Digital college textbooks

Rewiring the web

Donors warm up to online giving

Giving topped $300 billion in 2007. A small but rising percentage of those gifts came via the Internet.

Marriage counseling moves online

Click for marriage advice – but is it a valid option?

Hot and heavy ‘super Earths’

Five years, 5 billion downloads

Horizon highlights – 6.20.08

Listening for the right whale

Engineers have developed a network of underwater microphones that record the calls of the endangered North Atlantic right whales in the Massachusetts and Cape Cod bays.

No one lives in this submarine

A new autonomous robot can cruise underwater for seven months on a single battery charge.

New automobile tech is a stretch