Samsung unveiled the Galaxy S5 smartphone -- an improved, but not radically different, successor to last year's Galaxy S4.

Still, Samsung had a few tricks up its sleeve for its top-of-the-line Android phone. Samsung claims that the Galaxy S5 is weatherproof and resistant to water and dust. The phone's display can adapt to extreme bright and dim settings. The Galaxy S5 also has an on-board heart rate sensor and a fingerprint scanner on the home button.

Compared to last year's model, the Galaxy S5 has a bigger screen (5.1 inches), a faster processor (2 GHz) and a bigger battery. But none of those represent dramatic improvements. Its screen is 2% bigger, the processor is 5% faster and the battery is 8% larger than on the Galaxy S4.

(Source: CNN)